A) The fact that stars do not emit light continuously done clear
B) Frequent absorption of star light by their own atmosphere done clear
C) Frequent absorption of star light by the earth's atmosphere done clear
D) The refractive index fluctuations in the earth's atmosphere done clear
View Solution play_arrowquestion_answer2) The ratio of the refractive index of red light to blue light in air is [CPMT 1978]
A) Less than unity done clear
B) Equal to unity done clear
C) Greater than unity done clear
D) Less as well as greater than unity depending upon the experimental arrangement done clear
View Solution play_arrowA) Red light done clear
B) Violet light done clear
C) Green light done clear
D) Yellow light done clear
View Solution play_arrowA) \[4000\text{ }{AA}\] done clear
B) \[6000\text{ }{AA}\] done clear
C) \[9000\text{ }{AA}\] done clear
D) \[15000\text{ }{AA}\] done clear
View Solution play_arrowA) Frequency, wavelength and velocity done clear
B) Frequency and wavelength done clear
C) Frequency and velocity done clear
D) Wavelength and velocity done clear
View Solution play_arrowA) 1.5 done clear
B) 1.33 done clear
C) 1.0 done clear
D) 0.66 done clear
View Solution play_arrowA) 8.0 cm done clear
B) 10.5 cm done clear
C) 12.0 cm done clear
D) None of the above done clear
View Solution play_arrowquestion_answer8) Light of different colours propagates through air
A) With the velocity of air done clear
B) With different velocities done clear
C) With the velocity of sound done clear
D) Having the equal velocities done clear
View Solution play_arrowA) 1 : \[\mu \] done clear
B) 1 : \[{{\mu }^{2}}\] done clear
C) \[\mu \] : 1 done clear
D) 1 : 1 done clear
View Solution play_arrowA) Its velocity increases done clear
B) Its velocity decreases done clear
C) Its frequency decreases done clear
D) Its wavelength decreases done clear
View Solution play_arrowquestion_answer11) Refractive index for a material for infrared light is [CPMT 1984]
A) Equal to that of ultraviolet light done clear
B) Less than for ultraviolet light done clear
C) Equal to that for red colour of light done clear
D) Greater than that for ultraviolet light done clear
View Solution play_arrowA) \[6\times {{10}^{10}}\] done clear
B) \[3.0\times {{10}^{10}}\] done clear
C) \[2\times {{10}^{10}}\] done clear
D) \[1.5\times {{10}^{10}}\] done clear
View Solution play_arrowA) v > v and n > n done clear
B) v > v and n < n done clear
C) v < v and n > n done clear
D) v < v and n < n done clear
View Solution play_arrowA) 6 m done clear
B) 8/3 m done clear
C) 8 cm done clear
D) 10 cm done clear
View Solution play_arrowA) \[d\,\left( \frac{{{\mu }_{1}}{{\mu }_{2}}}{{{\mu }_{1}}+{{\mu }_{2}}} \right)\] done clear
B) \[d\,\left( \frac{1}{{{\mu }_{1}}}+\frac{1}{{{\mu }_{2}}} \right)\] done clear
C) \[2d\,\left( \frac{1}{{{\mu }_{1}}}+\frac{1}{{{\mu }_{2}}} \right)\] done clear
D) \[2d\,\left( \frac{1}{{{\mu }_{1}}{{\mu }_{2}}} \right)\] done clear
View Solution play_arrowA) \[t\,\left( 1-\frac{1}{\mu } \right)\] away done clear
B) \[t\,\left( 1+\frac{1}{\mu } \right)\] away done clear
C) \[t\,\left( 1-\frac{1}{\mu } \right)\] nearer done clear
D) \[t\,\left( 1+\frac{1}{\mu } \right)\] nearer done clear
View Solution play_arrowA) \[\frac{t}{nc}\] done clear
B) \[tnc\] done clear
C) \[\frac{nt}{c}\] done clear
D) \[\frac{tc}{n}\] done clear
View Solution play_arrowA) Speed done clear
B) Amplitude done clear
C) Frequency done clear
D) Wavelength done clear
View Solution play_arrowA) 8 min 20 sec done clear
B) 8 min done clear
C) 6 min 11 sec done clear
D) 11 min 6 sec done clear
View Solution play_arrowA) \[{{\mu }_{1}}{{d}_{1}}+{{\mu }_{2}}{{d}_{2}}\] done clear
B) \[{{\mu }_{1}}{{d}_{2}}+{{\mu }_{2}}{{d}_{1}}\] done clear
C) \[\frac{{{d}_{1}}{{d}_{2}}}{{{\mu }_{1}}{{\mu }_{2}}}\] done clear
D) \[\frac{{{d}_{1}}+{{d}_{2}}}{{{\mu }_{1}}{{\mu }_{2}}}\] done clear
View Solution play_arrowA) Liquid A and B only done clear
B) Liquid C only done clear
C) Liquid D and E only done clear
D) Liquid A, B, D and E done clear
View Solution play_arrowA) 8/9 done clear
B) 9/8 done clear
C) 7/6 done clear
D) None of these done clear
View Solution play_arrowA) \[_{3}{{\mu }_{1}}\] done clear
B) \[_{3}{{\mu }_{2}}\] done clear
C) \[\frac{1}{_{1}{{\mu }_{4}}}\] done clear
D) \[_{4}{{\mu }_{2}}\] done clear
View Solution play_arrowA) Green done clear
B) Blue done clear
C) Yellow done clear
D) Red done clear
View Solution play_arrowquestion_answer25) Ray optics fails when
A) The size of the obstacle is 5 cm done clear
B) The size of the obstacle is 3 cm done clear
C) The size of the obstacle is less than the wavelength of light done clear
D) (a) and (b) both done clear
View Solution play_arrowA) \[_{a}{{n}_{w}}\times {{\,}_{w}}{{n}_{gl}}\times {{\,}_{gl}}{{n}_{gas}}\times {{\,}_{gas}}{{n}_{a}}=1\] done clear
B) \[_{a}{{n}_{w}}\times {{\,}_{w}}{{n}_{gl}}\times {{\,}_{gas}}{{n}_{gl}}\times {{\,}_{gl}}{{n}_{a}}=1\] done clear
C) \[_{a}{{n}_{w}}\,\times {{\,}_{w}}{{n}_{gl}}\,\times {{\,}_{gl}}{{n}_{gas}}=1\] done clear
D) There is no such relation done clear
View Solution play_arrowA) \[5.\times {{10}^{14}}\,m/s\] done clear
B) \[2.25\times {{10}^{8}}\]m/s done clear
C) \[4.0\times {{10}^{8}}\]m/s done clear
D) Zero done clear
View Solution play_arrowA) Will emerge into the air without any deviation done clear
B) Will be reflected back into the glass done clear
C) Will be absorbed done clear
D) Will emerge into the air with an angle of refraction equal to 90° done clear
View Solution play_arrowA) \[\sqrt{\frac{\mu \varepsilon }{{{\mu }_{0}}{{\varepsilon }_{0}}}}\] done clear
B) \[\frac{\mu \,\varepsilon }{{{\mu }_{0}}{{\varepsilon }_{0}}}\] done clear
C) \[\sqrt{\frac{{{\mu }_{0}}{{\varepsilon }_{0}}}{\mu \varepsilon }}\] done clear
D) \[\sqrt{\frac{\mu {{\mu }_{0}}}{\varepsilon \,{{\varepsilon }_{0}}}}\] done clear
View Solution play_arrowA) \[2800\,\,{AA}\] done clear
B) \[5600\,\,{AA}\] done clear
C) \[3150\,\,{AA}\] done clear
D) \[4000\,\,{AA}\] done clear
View Solution play_arrowA) \[\frac{1}{\sqrt{{{\mu }_{0}}{{K}_{0}}}}\] done clear
B) \[\frac{1}{{{\mu }_{0}}{{K}_{0}}}\] done clear
C) \[\sqrt{{{\mu }_{0}}{{K}_{0}}}\] done clear
D) \[{{\mu }_{0}}{{K}_{0}}\] done clear
View Solution play_arrowA) Is 1.5 \[\times \] C done clear
B) Is C done clear
C) Is \[\frac{C}{1.5}\] done clear
D) Can have any velocity done clear
View Solution play_arrowA) \[\frac{\sin \theta }{\sin \theta '}\] done clear
B) \[\frac{\sin \theta }{\sin \varphi '}\] done clear
C) \[\frac{\sin \varphi '}{\sin \theta }\] done clear
D) \[\frac{AB}{CD}\] done clear
View Solution play_arrowquestion_answer34) When light enters from air to water, then its [MP PMT 1994; MP PET 1996]
A) Frequency increases and speed decreases done clear
B) Frequency is same but the wavelength is smaller in water than in air done clear
C) Frequency is same but the wavelength in water is greater than in air done clear
D) Frequency decreases and wavelength is smaller in water than in air done clear
View Solution play_arrowA) \[\frac{\sqrt{3}}{2}\] done clear
B) \[\sqrt{3}\] done clear
C) \[\frac{3}{2}\] done clear
D) \[\frac{1}{\sqrt{3}}\] done clear
View Solution play_arrowA) \[2.67\times {{10}^{8}}\] m/s done clear
B) \[2.25\times {{10}^{8}}\] m/s done clear
C) \[1.78\times {{10}^{8}}\] m/s done clear
D) \[1.50\times {{10}^{8}}\] m/s done clear
View Solution play_arrowA) \[4000\,\,{AA}\] done clear
B) \[5000\,\,{AA}\] done clear
C) \[6000\,\,{AA}\] done clear
D) \[5500\,\,{AA}\] done clear
View Solution play_arrowA) \[7200\,\,{AA}\] done clear
B) \[4800\,\,{AA}\] done clear
C) \[10800\,\,{AA}\] done clear
D) \[7201.5\,\,{AA}\] done clear
View Solution play_arrowquestion_answer39) Which of the following is not a correct statement [MP PET 1997]
A) The wavelength of red light is greater than the wavelength of green light done clear
B) The wavelength of blue light is smaller than the wavelength of orange light done clear
C) The frequency of green light is greater than the frequency of blue ligh done clear
D) The frequency of violet light is greater than the frequency of blue light done clear
View Solution play_arrowquestion_answer40) Which of the following is a correct relation [MP PET 1997]
A) \[_{a}{{\mu }_{r}}={{\,}_{a}}{{\mu }_{w}}\times \,{{\,}_{r}}{{\mu }_{\omega }}\] done clear
B) \[_{a}{{\mu }_{r}}\times {{\,}_{r}}{{\mu }_{w}}={{\,}_{w}}{{\mu }_{a}}\] done clear
C) \[_{a}{{\mu }_{r}}\times {{\,}_{r}}{{\mu }_{a}}=0\] done clear
D) \[_{a}{{\mu }_{r}}/{{\,}_{w}}{{\mu }_{r}}={{\,}_{a}}{{\mu }_{w}}\] done clear
View Solution play_arrowA) 0.25\[\times \]10?10 \[s\] done clear
B) \[0.167\times {{10}^{-7}}\]\[s\] done clear
C) \[2.5\times {{10}^{-10}}\]\[s\] done clear
D) \[1.0\times {{10}^{-10}}\]\[s\] done clear
View Solution play_arrowA) 45 cm done clear
B) 40 cm done clear
C) 30 cm done clear
D) 20 cm done clear
View Solution play_arrowA) Its wavelength and frequency both increase done clear
B) Its wavelength increases but frequency remains unchanged done clear
C) Its wavelength decreases but frequency remains unchanged done clear
D) Its wavelength and frequency both decrease done clear
View Solution play_arrowA) 1.33 done clear
B) \[\frac{9}{10}\] done clear
C) \[\frac{10}{9}\] done clear
D) 1.5v done clear
View Solution play_arrowA) h / n done clear
B) n / h done clear
C) h done clear
D) hn done clear
View Solution play_arrowquestion_answer46) On heating a liquid, the refractive index generally [KCET 1994]
A) Decreases done clear
B) Increases or decreases depending on the rate of heating done clear
C) Does not change done clear
D) Increases done clear
View Solution play_arrowA) \[\hat{i}\,.\,\hat{n}=\mu (\hat{r}\,.\,\hat{n})\] done clear
B) \[\hat{i}\times \hat{n}=\mu (\hat{n}\times \hat{r})\] done clear
C) \[\hat{i}\times \hat{n}=\mu (\hat{r}\times \hat{n})\] done clear
D) \[\mu (\hat{i}\times \hat{n})=\hat{r}\times \hat{n}\] done clear
View Solution play_arrowA) Refraction done clear
B) Interference done clear
C) Diffraction done clear
D) Reflection done clear
View Solution play_arrowA) \[3\times {{10}^{8}}\] \[m/s\] done clear
B) 332 \[m/s\] done clear
C) \[1.25\times {{10}^{8}}\] m/s done clear
D) \[7.2\times {{10}^{8}}\] \[m/s\] done clear
View Solution play_arrowA) \[2\times {{10}^{-8}}\] sec done clear
B) \[2\times {{10}^{8}}\] sec done clear
C) \[2\times {{10}^{-11}}\] sec done clear
D) \[2\times {{10}^{11}}\] sec done clear
View Solution play_arrowA) Of the same order as the wavelength of light done clear
B) Much smaller than the wavelength of light done clear
C) Of the order of one millimetre done clear
D) Much larger than the wavelength of light done clear
View Solution play_arrowA) \[3\times {{10}^{8}}\] \[m/s\] done clear
B) \[2.25\times {{10}^{8}}\] \[m/s\] done clear
C) \[4\times {{10}^{8}}\] \[m/s\] done clear
D) \[1.33\times {{10}^{8}}\] m/s done clear
View Solution play_arrowA) \[{{10}^{-5}}\,s\] done clear
B) \[{{10}^{-11}}\]\[s\] done clear
C) \[{{10}^{-9}}\]s done clear
D) \[{{10}^{-13}}\]\[s\] done clear
View Solution play_arrowA) \[\frac{9}{8}\] done clear
B) \[\frac{8}{9}\] done clear
C) \[\frac{1}{2}\] done clear
D) 2 done clear
View Solution play_arrowA) \[\frac{n}{\mu }\,,\,\frac{\lambda }{\mu },\,\frac{v}{\mu }\] done clear
B) \[n,\frac{\lambda }{\mu },\frac{v}{\mu }\] done clear
C) \[n\,,\,\lambda \,,\,\frac{\text{v}}{\mu }\] done clear
D) \[\frac{n}{\mu }\,,\,\,\]\[\frac{\lambda }{\mu }\,,\,v\] done clear
View Solution play_arrowA) \[4\times {{10}^{-11}}\] done clear
B) \[2\times {{10}^{-11}}\] done clear
C) \[16\times {{10}^{-11}}\] done clear
D) \[8\times {{10}^{-10}}\] done clear
View Solution play_arrowA) Blue done clear
B) Violet done clear
C) Green done clear
D) Red done clear
View Solution play_arrowA) \[1.96\times {{10}^{8}}\] m/s done clear
B) \[2.12\times {{10}^{8}}\] \[m/s\] done clear
C) \[3.18\times {{10}^{8}}\]\[m/s\] done clear
D) \[3.33\times {{18}^{8}}\]\[m/s\] done clear
View Solution play_arrowA) 4 : 3 done clear
B) 8 : 7 done clear
C) 8 : 9 done clear
D) 3 : 4 done clear
View Solution play_arrowA) 1.4 done clear
B) 1.5 done clear
C) 1.75 done clear
D) 1.33 done clear
View Solution play_arrowA) \[\frac{2.6}{1.5}\] done clear
B) \[\frac{1.5}{2.6}\] done clear
C) \[\frac{1.3}{1.5}\] done clear
D) \[\frac{1.5}{1.3}\] done clear
View Solution play_arrowA) 1.5 done clear
B) 2.5 done clear
C) 3.5 done clear
D) 4.5 done clear
View Solution play_arrowA) \[\frac{H({{n}_{1}}+{{n}_{2}}+{{n}_{3}}+{{n}_{4}})}{4}\] done clear
B) \[\frac{H\left( \frac{1}{{{n}_{1}}}+\frac{1}{{{n}_{2}}}+\frac{1}{{{n}_{3}}}+\frac{1}{{{n}_{4}}} \right)}{4}\] done clear
C) \[\frac{({{n}_{1}}+{{n}_{2}}+{{n}_{3}}+{{n}_{4}})}{4H}\] done clear
D) \[\frac{H\left( \frac{1}{{{n}_{1}}}+\frac{1}{{{n}_{2}}}+\frac{1}{{{n}_{3}}}+\frac{1}{{{n}_{4}}} \right)}{2}\] done clear
View Solution play_arrowA) \[{{\mu }_{1}}={{\mu }_{2}}\] done clear
B) \[{{\mu }_{2}}={{\mu }_{3}}\] done clear
C) \[{{\mu }_{3}}={{\mu }_{4}}\] done clear
D) \[{{\mu }_{4}}={{\mu }_{1}}\] done clear
View Solution play_arrowA) Reflection of the light done clear
B) Refraction of the light done clear
C) Scattering of the light done clear
D) Dispersion of the light done clear
View Solution play_arrowA) 24 m done clear
B) 12 m done clear
C) 18 m done clear
D) 9 m done clear
View Solution play_arrowA) 1.30 done clear
B) 1.36 done clear
C) 1.42 done clear
D) 1.46 done clear
View Solution play_arrowquestion_answer68) Which of the following statement is true [Orissa JEE 2002]
A) Velocity of light is constant in all media done clear
B) Velocity of light in vacuum is maximum done clear
C) Velocity of light is same in all reference frames done clear
D) Laws of nature have identical form in all reference frames done clear
View Solution play_arrowA) 58.3o done clear
B) 50o done clear
C) 35o done clear
D) 30o done clear
View Solution play_arrowA) 1 cm done clear
B) \[\frac{4}{3}\] cm done clear
C) 3 cm done clear
D) 4 cm done clear
View Solution play_arrowA) 0.64 done clear
B) 0.80 done clear
C) 1.20 done clear
D) 1.44 done clear
View Solution play_arrowquestion_answer72) Stars are twinkling due to [CPMT 1997]
A) Diffraction done clear
B) Reflection done clear
C) Refraction done clear
D) Scattering done clear
View Solution play_arrowA) \[36.1{}^\circ \] done clear
B) \[44.5{}^\circ \] done clear
C) \[26.8{}^\circ \] done clear
D) \[28.9{}^\circ \] done clear
View Solution play_arrowA) Behave as a perfect reflector done clear
B) Absorb all light falling on it done clear
C) Have refractive index one done clear
D) Have refractive index exactly matching with that of the surrounding fluid done clear
View Solution play_arrowA) \[{{\theta }_{1}}={{\theta }_{2}}\] done clear
B) \[{{\theta }_{1}}<{{\theta }_{2}}\] done clear
C) \[{{\theta }_{1}}>{{\theta }_{2}}\] done clear
D) Not predictable done clear
View Solution play_arrowA) 8 done clear
B) 6 done clear
C) 4 done clear
D) 2 done clear
View Solution play_arrowA) \[1.67\times {{10}^{14}}Hz\] done clear
B) \[9.10\times {{10}^{14}}Hz\] done clear
C) \[6\times {{10}^{14}}Hz\] done clear
D) \[4\times {{10}^{14}}Hz\] done clear
View Solution play_arrowA) 0.6 done clear
B) 0.8 done clear
C) 1.25 done clear
D) 1.75 done clear
View Solution play_arrowA) \[5890\,\,{AA}\] done clear
B) \[3681\,\,{AA}\] done clear
C) \[9424\,\,{AA}\] done clear
D) \[15078\,\,{AA}\] done clear
View Solution play_arrowA) 0.12 min done clear
B) 8.33 min done clear
C) 12.5 min done clear
D) 6.25 min done clear
View Solution play_arrowA) 2 mm done clear
B) 2 cm done clear
C) 2 m done clear
D) 2 km done clear
View Solution play_arrowA) \[{{\lambda }_{a}}/{{\lambda }_{m}}\] done clear
B) \[{{\lambda }_{m}}/{{\lambda }_{a}}\] done clear
C) \[{{\lambda }_{a}}\times {{\lambda }_{m}}\] done clear
D) None of these done clear
View Solution play_arrowA) White done clear
B) Black done clear
C) Blue done clear
D) Red done clear
View Solution play_arrowquestion_answer84) Speed of light is maximum in [CPMT 1990; MP PMT 1994; AFMC 1996]
A) Water done clear
B) Air done clear
C) Glass done clear
D) Diamond done clear
View Solution play_arrowquestion_answer85) Which one of the following statements is correct [KCET 1994]
A) In vacuum, the speed of light depends upon frequency done clear
B) In vacuum, the speed of light does not depend upon frequency done clear
C) In vacuum, the speed of light is independent of frequency and wavelength done clear
D) In vacuum, the speed of light depends upon wavelength done clear
View Solution play_arrowA) nl done clear
B) \[\frac{\lambda }{n}\] done clear
C) \[\frac{\lambda }{{{n}^{2}}}\] done clear
D) n2l done clear
View Solution play_arrowquestion_answer87) In vacuum the speed of light depends upon [MP PMT 2001]
A) Frequency done clear
B) Wave length done clear
C) Velocity of the source of light done clear
D) None of these done clear
View Solution play_arrowA) 2.0 done clear
B) 2.5 done clear
C) 1.6 done clear
D) 1.5 done clear
View Solution play_arrowA) 3.0 cm done clear
B) 4.0 cm done clear
C) 4.5 cm done clear
D) 5.0 cm done clear
View Solution play_arrowA) 9 cm done clear
B) 12 cm done clear
C) 3.8 cm done clear
D) 3 cm done clear
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