Diffraction and Wave Nature – Rankers Physics

Young's Double Slit Experiment: Practice Problem & Solution

Assertion (A): Diffraction is a sure indication of wave nature. Reason (R): Only transverse waves can be diffracted.  
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Young's Double Slit Experiment. Understanding the underlying formula is key to arriving at the correct answer below:

Assertion (A) is true; diffraction is a characteristic property of all waves. Reason (R) is false; both transverse (e.g., light) and longitudinal (e.g., sound) waves can be diffracted.

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Similar Practice Questions

Explore conceptually related problems to test your knowledge.

1. In a diffraction pattern due to a single slit of width \(a\), the first minimum is observed at an angle \(30^\circ\) when light of wavelength \(\lambda\) is incident on the slit. The first secondary maximum is observed at an angle
2. Ratio of intensities of two waves are given by 4 : 1. Then ratio of the amplitudes of the two waves is: (1991)
3. Assertion (A): Wave nature can be proved by phenomena of interference and diffraction. Reason (R): Only transverse wave can show the phenomena of polarization.
4. Assertion (A): In Young's experiment, the fringe width for dark fringes is different from that for bright fringes. Reason (R): In Young's double slit experiment with a source of white light, only black and white fringes are observed.  
5. Assertion (A): At the first glance the top surface of a Morpho's butterfly's wing appears a beautiful blue-green. If the wing moves, the colour changes. Reason (R): Different pigments in the wing reflect light at different angles. [Hint: It is due to interference of light rays reflected from different layers of wing.]