When light shines on a lens placed on a flat piece of glass,interference occurs which causes circular fringes called Newton's rings.The two beams that are interfering come:
A)from the top and bottom surface of the lens.
B)from the top surface of the lens and the top surface of the piece of glass.
C)from the bottom surface of the lens and the top surface of the piece of glass.
D)from the top and bottom surface of the flat piece of glass.

Question

Quizplus · Accepted Answer

The two beams that interfere are from the bottom surface of the lens and the top surface of the piece of glass. This is because the air between the lens and the glass causes a phase shift in the reflected light, which leads to interference between the two beams. This interference pattern creates the circular fringes known as Newton's rings.

When Light Shines on a Lens Placed on a Flat