Under what condition will light NOT change direction as it passes from one mediu

ID: 1452159 • Letter: U

Question

Under what condition will light NOT change direction as it passes from one medium to another? Select all the correct answers from the list below.

1.When the light is incident at a 45-degree angle to the normal.

2.When the light is incident along the normal.

3.When the second medium happens to have the same index of refraction as the first medium.

4.When the index of refraction of the second medium is exactly twice as large as the index or refraction of the first medium.

5.When the index of refraction of the second medium is less than the index of refraction of the first medium.

I know 3 is right

From snells law

n1 sin(theta1) = n2 sin(theta2)

if n1 = n2

theta1 = theta2

the deflection in first medium is equal to deflection in second medium. so there is no change in direction of light

Correct option is (3)

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