When a liquid is introduced into the air space between the lens and the plate in a newton's-rings apparatus, the diameter of the tenth ring changes from 1.52 cm to 1.21 cm. find the index of refraction of the liquid.

Explanation:

Newton's ring equation relates the initial and final diameter of the ring, to the index of refraction of the air and the index of refraction of the liquid between the lens and the plates, as follows:

Solving for :

Recall that the refractive index of the air is 1. So, replacing the given diameters:

that would be because of both gravity and friction. so     c

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

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