Question

identify the situations where the light ray dose not change the direction during refraction

Answer 1

Answer:

The only time that a wave can be transmitted across a boundary, change its speed, and still not refract is when the light wave approaches the boundary in a direction that is perpendicular to it. As long as the light wave changes speed and approaches the boundary at an angle, refraction is observed.

Explanation:

The only time that a wave can be transmitted across a boundary, change its speed, and still not refract is when the light wave approaches the boundary in a direction that is perpendicular to it. As long as the light wave changes speed and approaches the boundary at an angle, refraction is observed.

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Answer 2

Answer:

When the light ray is incident normally at the boundary between two media, it doesn't get refracted i.e it does not change the direction it is straight.