Answer:
When a ray of light falls on a glass slab normally, the angle between normal and incident ray is zero.
20/45=0.4*100= 44.4 so the answer is..................................................
Answer: 44.4%
Given:
The given value is
.
To find:
The value of the given expression by using the Binomial approximation.
Explanation:
We have,

It can be written as:

![[\because (1+x)^n=1+nx]](https://tex.z-dn.net/?f=%5B%5Cbecause%20%281%2Bx%29%5En%3D1%2Bnx%5D)


Therefore, the approximate value of the given expression is 1.0002.
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