If a sheet containing two very thin slits is heated (without damaging it),what happens to the angular location of the first-order interference minimum?
A)It moves toward the centerline.
B)It moves away from the centerline.
C)It doesn't change.

Question

Quizplus · Accepted Answer

Heating the sheet will cause it to expand, which will increase the distance between the two slits. As the distance between the slits increases, the angle of diffraction (which determines the location of the interference minimum) decreases. Therefore, the first-order interference minimum moves toward the centerline.

If a Sheet Containing Two Very Thin Slits Is Heated