Diffraction is observed around an obstacle of size $\approx$ 20 $\lambda$ . If the obstacle is reduced in size to $\approx$ 2 $\lambda$ , the diffraction effect
A) increases.
B) remains unchanged.
C) decreases.
D) none of the above.

Question

Quizplus · Accepted Answer

Diffraction effects increase when the size of the obstacle or aperture approaches the wavelength of the wave. Reducing the obstacle size to about 2λ, closer to the wavelength, enhances the diffraction observed.

Diffraction Is Observed Around an Obstacle of Size ≈\approx≈ 20 λ\lambdaλ If the Obstacle Is Reduced in Size To 20

Diffraction Is Observed Around an Obstacle of Size $\approx$ 20 $\lambda$ If the Obstacle Is Reduced in Size To 20