Physics · Laws of Refraction

What is the first law of refraction?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1The angle of incidence is equal to the angle of refraction.
2The incident ray is always perpendicular to the surface.
3The ratio of sine of angle of incidence to sine of angle of refraction is constant.
4The incident ray, the refracted ray, and the normal all lie in the same plane.✓

Correct answer

The incident ray, the refracted ray, and the normal all lie in the same plane.

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