science
Grade-7
Easy
Question
During normal incidence on multiple mediums placed one after the other, the angle of incidence = ____.
- The angle of refraction
- The angle of emergence
- Both 1 and 2
- None of the above
Hint:
In case of a glass slab, the incident ray is parallel to the emergent ray.
The correct answer is: Both 1 and 2
- In case of a glass slab, the incident ray is parallel to the emergent ray. It means that the angle of incidence is equal to the angle of emergence. When a ray of light is incident on the surface of a glass slab, it undergoes refraction.
- In case of normal incidence, angle of incidence= angle of refraction= 0 degree.
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