Question

In diffraction experiment from single slit, the angular width of the central maxima does NOT depend upon

• A. width of the slit
• B. wavelength of light used.
• C. ratio of wavelength and slit width.
• D. distance of the slit from the screen.

Hint:

Angular width of the central maximum is 2 lambda over a; the screen distance only sets the linear width.

Answer 1

The Correct Option is D

Step 1: Approach
Check each option against the formula $2\lambda/a$.

Step 2: Check
(A) $a$ appears. (B) $\lambda$ appears. (C) The ratio $\lambda/a$ is the whole formula. (D) $D$ does not appear.

Step 3: Answer
Option (D).

Final Answer:
The angle is 2 lambda over a, which contains no screen distance, option (D). \[ \boxed{\text{distance of the slit from the screen}} \]