Question

This formula can also be used for plane surfaces. In the
Substituting
n/v- n/u=(n,-n, )/R
n, n-(n,-n.)
V u R
plane surface, radius of curvature (R) approaches infinit
becomes zero. Substituting this in equation 5, we get for
plane surfaces
n./V-n,/u=0>n_/v=n,/u
NOTE: The distances u and y are measured from the plae
Let us consider the following examples.
Example 1
A bird is flying down vertically towards the surface of wa​

Answer 1

Explanation:

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Answer 2

Answer:

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