NEWTON’S RINGS - Q9

9) Instead of reflected rays, if you look at transmitted rays, what do you expect to observe?

Ans: Newton’s rings can also be formed in transmitted light, as shown in figure. In this case there is no phase change because the reflection is not considered. So the two rays are in phase and the central spot is bright. The conditions for the bright and dark rings in the transmitted system are opposite to those in reflected system. But the visibility of fringes is much higher in reflected system than in transmitted system.