| Directions: Assertion - Reaction type. Each of these contains tow statements: Statement I (Assertion), Statement II (Reason). Each of these questions also has four alternative choices, only one of which is correct. You have to select the correct choices from the codes (a), (b), (c) and (d) given below: |
| Statement I: No diffraction is produced in sound waves near a very small opening. |
| Statement II: For diffraction to take place the aperture of opening should be of the same order as wavelength of the waves. |
A) Statement I is true; Statement II is true; Statement II is not a correct explanation for Statement I,
B) Statement I is true; Statement II is false.
C) Statement I is false; Statement II is true.
D) Statement I is true; Statement II is true; Statements is the correct explanation for Statement I.
Correct Answer: A
Solution :
So, if u is made n times, the time of flight becomes n times but range becomes n2 times. The diffraction of sound is only possible when the size of opening should be of the same order as its wavelength and the wavelength of sound is of the order of 1.0 m, hence, for a very small opening no diffraction is produced in sound waves.
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