Diffraction Universality and Conditions – Rankers Physics

Diffraction: Practice Problem & Solution

Assertion (A): Diffraction takes place for all types of waves mechanical or non-mechanical, transverse or longitudinal. Reason (R): Diffraction's effects are perceptible only if wavelength of wave is comparable to dimensions of diffracting device.  
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

Solution Explained:

To solve this problem, we apply the core principles of Diffraction. Understanding the underlying formula is key to arriving at the correct answer below:

Both Assertion (A) and Reason (R) are true. Diffraction is a universal wave phenomenon, occurring for all wave types. Its effects are most noticeable when the wavelength is comparable to the obstacle's size.

However, (R) states the condition for observation, not the fundamental reason why diffraction occurs for all waves (A).

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