The dark spot observed in the center of a Newton's rings pattern is attributed to which of the following?
A)polarization of light when reflected
B)polarization of light when refracted
C)phase shift of light when reflected
D)phase shift of light when refracted

Question

Quizplus · Accepted Answer

The dark spot observed in the center of a Newton's rings pattern is attributed to a phase shift of light when reflected. At the point of contact between the convex lens and the flat surface of the glass plate, a thin film of air is formed. This results in the reflection of the light waves from both surfaces, and as a result, a phase shift occurs in the reflected light waves. The phase difference between the two reflected waves causes destructive interference in the center of the pattern, resulting in the dark spot.

The Dark Spot Observed in the Center of a Newton's