Question

Read the following:
(A) The width of the central band in a diffraction pattern.
(B) The width of the first bright band in the diffraction pattern.
(C) The width of the central band in the diffraction pattern if D is doubled.
(D) The width of the first bright band in the diffraction pattern if D is tripled.
Choose the correct answer from the options given below in increasing order of width.

• A. (A), (B), (D), (C)
• B. (A), (C), (D), (B)
• C. (C), (A), (D), (B)
• D. (B), (A), (D), (C)

Answer 1

Answer: (D)

(B), (A), (D), (C)

Answer 2

The width of the diffraction bands is proportional to the wavelength and in versely proportional to the slit width D. As D increases, the width decreases.