Optics Question 885

Question: The width of the diffraction band varies

Options:

A) inversely as the wavelength

B) directly as the width of the slit

C) directly as the distance between the slit and the screen

D) inversely as the size of the source from which the slit is illuminated

Show Answer

Answer:

Correct Answer: C

Solution:

[c] The width of the diffraction band is given by $ \beta =\frac{\lambda D}{d}\Rightarrow \beta \propto \lambda $

$ \beta \propto D $ and $ \beta \propto \frac{1}{d} $ .



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