Diffraction and Dispersion – Rankers Physics

Diffraction: Practice Problem & Solution

Assertion (A): Diffraction of light is due to dispersion. Reason (R): Change in path of light around "the corners separates the wavelength of various colours.  
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:

Assertion (A) is false; diffraction is the bending of waves, while dispersion is wavelength-dependent refractive index. Reason (R) is false; color separation in diffraction is due to \(\theta \propto \lambda\), not dispersion around corners.

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