Answer:
In Optics, The angle of incidence to which the angle of refraction is 90° is called the critical angle. The ratio of velocities of a light ray in the air to the given medium is a refractive index.
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Answers & Comments
Answer:
In Optics, The angle of incidence to which the angle of refraction is 90° is called the critical angle. The ratio of velocities of a light ray in the air to the given medium is a refractive index.
Hope it helps you army :)
Answer:
hii unnie are you angry to me why are you not talking with me
borahea unnie