Physics
Grade-10
Easy
Question
In case of refraction through a concave lens, the emergent ray is _____ to the incident ray.
- Parallel to
- Not perpendicular to
- Perpendicular to
- All of these
Hint:
Refraction through a concave lens results in the perpendicular ray travelling without deviation after emerging.
The correct answer is: Not perpendicular to
In the case of refraction through a concave lens, the emergent ray is not perpendicular to the incident ray.
- A ray that passes through the concave lens on refraction, gets deviated from the direction of incidence.
- The perpendicular ray travels without deviation after emerging.
- So the emergent ray is not perpendicular to the incident ray.
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