Consider the diffraction pattern for a small pinhole. As the size of the hole is increased

Options

A. the size decreases
B. the intensity increases
C. the size increases
D. the intensity decreases

Answer

A, B

Explanation

As size of hole (a) is increased, width of central maximum of diffraction pattern of hole `(= (2 f lambda)/(a))`
decreases. As the same amount of light emergy is now distributed over a smaller area, the intensity increases. Choice (a) and (b) are correct.