Question

why does the ray of light displace from its path when enters into another medium from one medium

Answer 1

Hi friend here is your answer

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So a ray actually represents a waves direction of propagation. Now when a wave is incident onto a surface of a different medium, the phase velocity changes (the rate which light propagates through space) yet the frequency stays the same. This means that monochromatic light stays the same color as it goes through any medium. As such, the spacing of photons needs to stay the same.

When the light goes from a medium of low refractive index to high (air into water), the part of the wave that hits the medium first is slowed down, while the part of the wave that hasn’t hit the medium yet is still going fast. So, like a marching band going around a corner, to maintain frequence, the wave bends until the entire wave is in the same medium, going the same speed.

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Hope it helps you...........!!
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One day ish

Answer 2

as it is due to refraction