Question

in which type. of various cases the ray of light does not change its original path even after change its media​

Answer 1

Answer:

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Explanation:

When a light ray is incident on the interface of the two media then it undergoes refraction and enters into the other medium following Snell's Law

refractive index μ=sin(r)sin(i)

when light ray strikes the interface it does not deviate inder these two cases:

(i) when light ray falls normally to the interface i.e,i=0o

(ii) when the refractive indices of both the medium is same then light ray passes undeviated as it will not observe as any change in the medium boundary