Question

 A ray of light travelling obliquely from glass to air?​

Answer 1

Answer:

When a ray of light travels from air into water obliquely, it bends towards the normal. This is because water is optically denser than air. On entering water, speed of light decreases and the light bends towards normal.

Explanation:

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Answer 2

If a ray goes from denser medium (glass) to rarer medium (air) the ray bends toward the normal ray.

Normal ray is perpendicular to the surface.

cause of bending of ray is the changing of speed of light due to different medium.