If a sheet containing a single thin slit is heated (without damaging it)and therefore expands,what happens to the width of the central bright diffraction region on a distant screen?
A)It gets narrower.
B)It gets wider.
C)It doesn't change.

Question

Quizplus · Accepted Answer

The width of the central bright diffraction region is given by the equation w = λL/d, where λ is the wavelength of light, L is the distance from the slit to the screen, and d is the width of the slit. As the sheet containing the slit is heated and expands, the width of the slit increases, which means the value of d in the equation for w will increase. As a result, the width of the central bright diffraction region on the screen will get wider.

If a Sheet Containing a Single Thin Slit Is Heated