-
question_answer1)
By corpuscular theory of light, the phenomenon which can be explained is
A)
Refraction done
clear
B)
Interference done
clear
C)
Diffraction done
clear
D)
Polarisation done
clear
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question_answer2)
According to corpuscular theory of light, the different colours of light are due to
A)
Different electromagnetic waves done
clear
B)
Different force of attraction among the corpuscles done
clear
C)
Different size of the corpuscles done
clear
D)
None of the above done
clear
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question_answer3)
Huygen's conception of secondary waves [CPMT 1975]
A)
Allow us to find the focal length of a thick lens done
clear
B)
Is a geometrical method to find a wavefront done
clear
C)
Is used to determine the velocity of light done
clear
D)
Is used to explain polarization done
clear
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question_answer4)
The idea of the quantum nature of light has emerged in an attempt to explain [CPMT 1990]
A)
Interference done
clear
B)
Diffraction done
clear
C)
Radiation spectrum of a black body done
clear
D)
Polarisation done
clear
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question_answer5)
Two coherent sources of light can be obtained by [MH CET 2001]
A)
Two different lamps done
clear
B)
Two different lamps but of the same power done
clear
C)
Two different lamps of same power and having the same colour done
clear
D)
None of the above done
clear
View Solution play_arrow
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question_answer6)
By Huygen's wave theory of light, we cannot explain the phenomenon of [CPMT 1989; AFMC 1993, 99; MP PET 1995, 2003; RPMT 2003; BCECE 2003; Pb PMT 2004]
A)
Interference done
clear
B)
Diffraction done
clear
C)
Photoelectric effect done
clear
D)
Polarisation done
clear
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question_answer7)
The phenomenon of interference is shown by [MNR 1994; MP PMT 1997; AIIMS 1999, 2000; JIPMER 2000; UPSEAT 1994, 2000]
A)
Longitudinal mechanical waves only done
clear
B)
Transverse mechanical waves only done
clear
C)
Electromagnetic waves only done
clear
D)
All the above types of waves done
clear
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question_answer8)
Two coherent monochromatic light beams of intensities I and 4I are superposed. The maximum and minimum possible intensities in the resulting beam are [IIT-JEE 1988; RPMT 1995; AIIMS 1997; MP PMT 1997;MP PET 1999; BHU 2002; KCET 2000, 05]
A)
5I and I done
clear
B)
5I and 3I done
clear
C)
9I and I done
clear
D)
9I and 3I done
clear
View Solution play_arrow
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question_answer9)
Light appears to travel in straight lines since [RPMT 1997; CPMT 1987, 89, 90, 2001; AIIMS 1998, 2002; KCET 2002; BHU 2002; DCE 2003]
A)
It is not absorbed by the atmosphere done
clear
B)
It is reflected by the atmosphere done
clear
C)
Its wavelength is very small done
clear
D)
Its velocity is very large done
clear
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question_answer10)
The idea of secondary wavelets for the propagation of a wave was first given by [Orissa PMT 2004]
A)
Newton done
clear
B)
Huygen done
clear
C)
Maxwell done
clear
D)
Fresnel done
clear
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question_answer11)
By a monochromatic wave, we mean [AFMC 1995]
A)
A single ray done
clear
B)
A single ray of a single colour done
clear
C)
Wave having a single wavelength done
clear
D)
Many rays of a single colour done
clear
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question_answer12)
The similarity between the sound waves and light waves is [KCET 1994]
A)
Both are electromagnetic waves done
clear
B)
Both are longitudinal waves done
clear
C)
Both have the same speed in a medium done
clear
D)
They can produce interference done
clear
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question_answer13)
The ratio of intensities of two waves is 9 : 1. They are producing interference. The ratio of maximum and minimum intensities will be [MNR 1987 MP PET 1999; AMU (Engg.) 1999; AIIMS 2000]
A)
10 : 8 done
clear
B)
9 : 1 done
clear
C)
4 : 1 done
clear
D)
2 : 1 done
clear
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question_answer14)
A wave can transmit ...... from one place to another [CPMT 1984]
A)
Energy done
clear
B)
Amplitude done
clear
C)
Wavelength done
clear
D)
Matter done
clear
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question_answer15)
If the ratio of intensities of two waves is 1 : 25, then the ratio of their amplitudes will be [CPMT 1984]
A)
1 : 25 done
clear
B)
5 : 1 done
clear
C)
26 : 24 done
clear
D)
1 : 5 done
clear
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question_answer16)
Two identical light sources S1 and S2 emit light of same wavelength l. These light rays will exhibit interference if [MP PMT 1993]
A)
Their phase differences remain constant done
clear
B)
Their phases are distributed randomly done
clear
C)
Their light intensities remain constant done
clear
D)
Their light intensities change randomly done
clear
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question_answer17)
Wave nature of light follows because [MP PMT 1993]
A)
Light rays travel in a straight line done
clear
B)
Light exhibits the phenomena of reflection and refraction done
clear
C)
Light exhibits the phenomenon of interference done
clear
D)
Light causes the phenomenon of photoelectric effect done
clear
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question_answer18)
If L is the coherence length and c the velocity of light, the coherent time is [MP PMT 1996]
A)
cL done
clear
B)
\[\frac{L}{c}\] done
clear
C)
\[\frac{c}{L}\] done
clear
D)
\[\frac{1}{Lc}\] done
clear
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question_answer19)
If the amplitude ratio of two sources producing interference is 3 : 5, the ratio of intensities at maxima and minima is [MP PMT 1996]
A)
25 : 16 done
clear
B)
5 : 3 done
clear
C)
16 : 1 done
clear
D)
25 : 9 done
clear
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question_answer20)
Colours of thin films result from [CPMT 1972, 83, 96; RPMT 1997; DCE 2002; AIIMS 2005] or On a rainy day, a small oil film on water show brilliant colours. This is due to [MP PET 2004]
A)
Dispersion of light done
clear
B)
Interference of light done
clear
C)
Absorption of light done
clear
D)
Scattering of light done
clear
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question_answer21)
For constructive interference to take place between two monochromatic light waves of wavelength l, the path difference should be [MNR 1992; UPSEAT 2001]
A)
\[(2n-1)\frac{\lambda }{4}\] done
clear
B)
\[(2n-1)\frac{\lambda }{2}\] done
clear
C)
\[n\lambda \] done
clear
D)
\[(2n+1)\frac{\lambda }{2}\] done
clear
View Solution play_arrow
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question_answer22)
Two sources of waves are called coherent if [NCERT 1984; MNR 1995; RPMT 1996, 97; CPMT 1997; UPSEAT 1995, 2000; Orissa JEE 2002; RPET 2003; MP PMT 1996, 2004]
A)
Both have the same amplitude of vibrations done
clear
B)
Both produce waves of the same wavelength done
clear
C)
Both produce waves of the same wavelength having constant phase difference done
clear
D)
Both produce waves having the same velocity done
clear
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question_answer23)
Soap bubble appears coloured due to the phenomenon of [AFMC 1995, 97; RPET 1997; CBSE PMT 1999; Pb PET 2001]
A)
Interference done
clear
B)
Diffraction done
clear
C)
Dispersion done
clear
D)
Reflection done
clear
View Solution play_arrow
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question_answer24)
Which of the following statements indicates that light waves are transverse [MP PMT 1995; AFMC 1996]
A)
Light waves can travel in vacuum done
clear
B)
Light waves show interference done
clear
C)
Light waves can be polarized done
clear
D)
Light waves can be diffracted done
clear
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question_answer25)
If two light waves having same frequency have intensity ratio 4 : 1 and they interfere, the ratio of maximum to minimum intensity in the pattern will be [BHU 1995; MP PMT 1995; DPMT 1999; CPMT 2003]
A)
9 : 1 done
clear
B)
3 : 1 done
clear
C)
25 : 9 done
clear
D)
16 : 25 done
clear
View Solution play_arrow
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question_answer26)
Evidence for the wave nature of light cannot be obtained from [MP PET 1996]
A)
Reflection done
clear
B)
Doppler effect done
clear
C)
Interference done
clear
D)
Diffraction done
clear
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question_answer27)
Two light sources are said to be coherent if they are obtained from [MP PET 1996]
A)
Two independent point sources emitting light of the same wavelength done
clear
B)
A single point source done
clear
C)
A wide source done
clear
D)
Two ordinary bulbs emitting light of different wavelengths done
clear
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question_answer28)
Wavelength of light of frequency 100Hz [CBSE PMT 1999]
A)
\[2\times {{10}^{6}}m\] done
clear
B)
\[3\times {{10}^{6}}m\] done
clear
C)
\[4\times {{10}^{6}}m\] done
clear
D)
\[5\times {{10}^{6}}m\] done
clear
View Solution play_arrow
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question_answer29)
Two waves having intensity in the ratio 25 : 4 produce interference. The ratio of the maximum to the minimum intensity is [CPMT 1999]
A)
5 : 2 done
clear
B)
7 : 3 done
clear
C)
49 : 9 done
clear
D)
9 : 49 done
clear
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question_answer30)
Wavefront means [RPMT 1997, 98]
A)
All particles in it have same phase done
clear
B)
All particles have opposite phase of vibrations done
clear
C)
Few particles are in same phase, rest are in opposite phase done
clear
D)
None of these done
clear
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question_answer31)
Wave front of a wave has direction with wave motion [RPMT 1997]
A)
Parallel done
clear
B)
Perpendicular done
clear
C)
Opposite done
clear
D)
At an angle of q done
clear
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question_answer32)
Which one of the following phenomena is not explained by Huygen's construction of wavefront [CBSE PMT 1992]
A)
Refraction done
clear
B)
Reflection done
clear
C)
Diffraction done
clear
D)
Origin of spectra done
clear
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question_answer33)
Interference was observed in interference chamber when air was present, now the chamber is evacuated and if the same light is used, a careful observer will see [CBSE PMT 1993; DPMT 2000; BHU 2002]
A)
No interference done
clear
B)
Interference with bright bands done
clear
C)
Interference with dark bands done
clear
D)
Interference in which width of the fringe will be slightly increased done
clear
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question_answer34)
The ratio of intensities of two waves are given by 4 : 1. The ratio of the amplitudes of the two waves is [CBSE PMT 1993]
A)
2 : 1 done
clear
B)
1 : 2 done
clear
C)
4 : 1 done
clear
D)
1 : 4 done
clear
View Solution play_arrow
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question_answer35)
For the sustained interference of light, the necessary condition is that the two sources should [DPMT 1996; RPMT 1998, 2003]
A)
Have constant phase difference done
clear
B)
Be narrow done
clear
C)
Be close to each other done
clear
D)
Of same amplitude done
clear
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question_answer36)
If the ratio of amplitude of two waves is 4 : 3, then the ratio of maximum and minimum intensity is [AFMC 1997]
A)
16 : 18 done
clear
B)
18 : 16 done
clear
C)
49 : 1 done
clear
D)
94 : 1 done
clear
View Solution play_arrow
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question_answer37)
Which of the following is conserved when light waves interfere [MNR 1998]
A)
Intensity done
clear
B)
Energy done
clear
C)
Amplitude done
clear
D)
Momentum done
clear
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question_answer38)
Intensity of light depends upon [RPMT 1999]
A)
Velocity done
clear
B)
Wavelength done
clear
C)
Amplitude done
clear
D)
Frequency done
clear
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question_answer39)
Ray diverging from a point source from a wave front that is [RPET 2000]
A)
Cylindrical done
clear
B)
Spherical done
clear
C)
Plane done
clear
D)
Cubical done
clear
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question_answer40)
Ratio of amplitude of interfering waves is 3 : 4. Now ratio of their intensities will be [RPET 2000]
A)
\[\frac{16}{9}\] done
clear
B)
49 : 1 done
clear
C)
\[\frac{9}{16}\] done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer41)
Two coherent sources have intensity in the ratio of \[\frac{100}{1}\]. Ratio of (intensity) max/(intensity) min is [RPET 2000]
A)
\[\frac{1}{100}\] done
clear
B)
\[\frac{1}{10}\] done
clear
C)
\[\frac{10}{1}\] done
clear
D)
\[\frac{3}{2}\] done
clear
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question_answer42)
If two waves represented by \[{{y}_{1}}=4\sin \omega t\] and \[{{y}_{2}}=3\sin \left( \omega t+\frac{\pi }{3} \right)\] interfere at a point, the amplitude of the resulting wave will be about [MP PMT 2000]
A)
7 done
clear
B)
6 done
clear
C)
5 done
clear
D)
3.5 done
clear
View Solution play_arrow
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question_answer43)
The two waves represented by y1 = a sin(wt) and \[{{y}_{2}}=b\cos (\omega t)\] have a phase difference of [MP PMT 2000]
A)
0 done
clear
B)
\[\frac{\pi }{2}\] done
clear
C)
p done
clear
D)
\[\frac{\pi }{4}\] done
clear
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question_answer44)
In a wave, the path difference corresponding to a phase difference of f is [MP PET 2000]
A)
\[\frac{\pi }{2\lambda }\varphi \] done
clear
B)
\[\frac{\pi }{\lambda }\varphi \] done
clear
C)
\[\frac{\lambda }{2\pi }\varphi \] done
clear
D)
\[\frac{\lambda }{\pi }\varphi \] done
clear
View Solution play_arrow
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question_answer45)
Two coherent sources of intensities, I1 and I2 produce an interference pattern. The maximum intensity in the interference pattern will be [UPSEAT 2001; MP PET 2001]
A)
I1 + I2 done
clear
B)
\[I_{1}^{2}+I_{2}^{2}\] done
clear
C)
(I1 + I2)2 done
clear
D)
\[{{(\sqrt{{{I}_{1}}}+\sqrt{{{I}_{2}}})}^{2}}\] done
clear
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question_answer46)
Newton postulated his corpuscular theory on the basis of [UPSEAT 2001; KCET 2001]
A)
Newton?s rings done
clear
B)
Colours of thin films done
clear
C)
Rectilinear propagation of light done
clear
D)
Dispersion of white light done
clear
View Solution play_arrow
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question_answer47)
The dual nature of light is exhibited by [KCET 1999; AIIMS 2001; BHU 2001; MH CET 2003; BCECE 2004]
A)
Photoelectric effect done
clear
B)
Refraction and interference done
clear
C)
Diffraction and reflection done
clear
D)
Diffraction and photoelectric effect done
clear
View Solution play_arrow
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question_answer48)
Two beams of light having intensities I and 4I interfere to produce a fringe pattern on a screen. The phase difference between the beams is \[\frac{\pi }{2}\] at point A and p at point B. Then the difference between the resultant intensities at A and B is [IIT JEE (Screening) 2001]
A)
2I done
clear
B)
4I done
clear
C)
5I done
clear
D)
7I done
clear
View Solution play_arrow
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question_answer49)
Coherent sources are those sources for which [RPET 2001]
A)
Phase difference remain constant done
clear
B)
Frequency remains constant done
clear
C)
Both phase difference and frequency remains constant done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer50)
Wave nature of light is verified by [RPET 2001]
A)
Interference done
clear
B)
Photoelectric effect done
clear
C)
Reflection done
clear
D)
Refraction done
clear
View Solution play_arrow
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question_answer51)
Two waves are represented by the equations \[{{y}_{1}}=a\sin \omega t\] and \[{{y}_{2}}=a\cos \omega t.\] The first wave [MP PMT 2001]
A)
Leads the second by p done
clear
B)
Lags the second by p done
clear
C)
Leads the second by \[\frac{\pi }{2}\] done
clear
D)
Lags the second by \[\frac{\pi }{2}\] done
clear
View Solution play_arrow
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question_answer52)
Light waves producing interference have their amplitudes in the ratio 3 : 2. The intensity ratio of maximum and minimum of interference fringes is [EAMCET 2001]
A)
36 : 1 done
clear
B)
9 : 4 done
clear
C)
25 : 1 done
clear
D)
6 : 4 done
clear
View Solution play_arrow
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question_answer53)
Laser beams are used to measure long distance because [DCE 2001]
A)
They are monochromatic done
clear
B)
They are highly polarised done
clear
C)
They are coherent done
clear
D)
They have high degree of parallelism done
clear
View Solution play_arrow
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question_answer54)
Two coherent sources of different intensities send waves which interfere. The ratio of maximum intensity to the minimum intensity is 25. The intensities of the sources are in the ratio [UPSEAT 2002]
A)
25 : 1 done
clear
B)
5 : 1 done
clear
C)
9 : 4 done
clear
D)
25 : 16 done
clear
View Solution play_arrow
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question_answer55)
The frequency of light ray having the wavelength 3000 Å is [DPMT 2002]
A)
9 ´ 1013 cycles/sec done
clear
B)
1015 cycles/sec done
clear
C)
90 cycles/sec done
clear
D)
3000 cycles/sec done
clear
View Solution play_arrow
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question_answer56)
Two waves have their amplitudes in the ratio 1 : 9. The maximum and minimum intensities when they interfere are in the ratio [KCET 2002]
A)
\[\frac{25}{16}\] done
clear
B)
\[\frac{16}{26}\] done
clear
C)
\[\frac{1}{9}\] done
clear
D)
\[\frac{9}{1}\] done
clear
View Solution play_arrow
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question_answer57)
Huygen?s principle of secondary wavelets may be used to [KCET 2002]
A)
Find the velocity of light in vacuum done
clear
B)
Explain the particle behaviour of light done
clear
C)
Find the new position of the wavefront done
clear
D)
Explain photoelectric effect done
clear
View Solution play_arrow
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question_answer58)
What is the path difference of destructive interference [AIIMS 2002]
A)
nl done
clear
B)
\[n(\lambda +1)\] done
clear
C)
\[\frac{(n+1)\lambda }{2}\] done
clear
D)
\[\frac{(2n+1)\lambda }{2}\] done
clear
View Solution play_arrow
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question_answer59)
If an interference pattern have maximum and minimum intensities in 36 : 1 ratio then what will be the ratio of amplitudes [AFMC 2002]
A)
5 : 7 done
clear
B)
7 : 4 done
clear
C)
4 : 7 done
clear
D)
7 : 5 done
clear
View Solution play_arrow
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question_answer60)
Intensities of the two waves of light are I and 4I. The maximum intensity of the resultant wave after superposition is [MP PET 2002]
A)
5 I done
clear
B)
9 I done
clear
C)
16 I done
clear
D)
25 I done
clear
View Solution play_arrow
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question_answer61)
As a result of interference of two coherent sources of light, energy is [MP PMT 2002; KCET 2003]
A)
Increased done
clear
B)
Redistributed and the distribution does not vary with time done
clear
C)
Decreased done
clear
D)
Redistributed and the distribution changes with time done
clear
View Solution play_arrow
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question_answer62)
To demonstrate the phenomenon of interference, we require two sources which emit radiation [AIEEE 2003]
A)
Of the same frequency and having a define phase relationship done
clear
B)
Of nearly the same frequency done
clear
C)
Of the same frequency done
clear
D)
Of different wavelengths done
clear
View Solution play_arrow
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question_answer63)
When a beam of light is used to determine the position of an object, the maximum accuracy is achieved if the light is [AIIMS 2003]
A)
Polarised done
clear
B)
Of longer wavelength done
clear
C)
Of shorter wavelength done
clear
D)
Of high intensity done
clear
View Solution play_arrow
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question_answer64)
If the distance between a point source and screen is doubled, then intensity of light on the screen will become [RPET 1997; RPMT 1999]
A)
Four times done
clear
B)
Double done
clear
C)
Half done
clear
D)
One-fourth done
clear
View Solution play_arrow
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question_answer65)
Huygen wave theory allows us to know [AFMC 2004]
A)
The wavelength of the wave done
clear
B)
The velocity of the wave done
clear
C)
The amplitude of the wave done
clear
D)
The propagation of wave fronts done
clear
View Solution play_arrow
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question_answer66)
The wave theory of light was given by [J & K CET 2004; KCET 2005]
A)
Maxwell done
clear
B)
Planck done
clear
C)
Huygen done
clear
D)
Young done
clear
View Solution play_arrow
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question_answer67)
The phase difference between incident wave and reflected wave is 180° when light ray [RPMT 1998, 2001]
A)
Enters into glass from air done
clear
B)
Enters into air from glass done
clear
C)
Enters into glass from diamond done
clear
D)
Enters into water from glass done
clear
View Solution play_arrow
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question_answer68)
Which of the following phenomena can explain quantum nature of light [RPMT 2001]
A)
Photoelectric effect done
clear
B)
Interference done
clear
C)
Diffraction done
clear
D)
Polarisation done
clear
View Solution play_arrow
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question_answer69)
Which of the following is not a property of light [AFMC 2005]
A)
It requires a material medium for propagation done
clear
B)
It can travel through vacuum done
clear
C)
It involves transportation of energy done
clear
D)
It has finite speed done
clear
View Solution play_arrow
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question_answer70)
What causes changes in the colours of the soap or oil films for the given beam of light [AFMC 2005]
A)
Angle of incidence done
clear
B)
Angle of reflection done
clear
C)
Thickness of film done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer71)
Select the right option in the following [KCET 2005]
A)
Christian Huygens a contemporary of Newton established the wave theory of light by assuming that light waves were transverse done
clear
B)
Maxwell provided the compelling theoretical evidence that light is transverse wave done
clear
C)
Thomas Young experimentally proved the wave behaviour of light and Huygens assumption done
clear
D)
All the statements give above, correctly answers the question ?what is light? done
clear
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question_answer72)
Two waves of intensity I undergo Interference. The maximum intensity obtained is [BHU 2005]
A)
I / 2 done
clear
B)
I done
clear
C)
2I done
clear
D)
4I done
clear
View Solution play_arrow