Physics
When a ray of light travels normal to the given surface, then the angle of refraction is:
- 180°
- 90°
- 0°
- 45°
Refraction Plane Surfaces
ICSE 2023
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Answer
0°
Reason — The ray of light incident normally on a plane glass slab passes undeviated, ( i.e. such a ray suffers no bending at the surface). Thus, if angle of incidence ∠i = 0°, then the angle of refraction ∠r = 0°.
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