science
Grade-7
Easy

Question

During normal incidence on multiple mediums placed one after the other, the angle of incidence = ____.

  1. The angle of refraction
  2. The angle of emergence
  3. Both 1 and 2
  4. None of the above

hintHint:

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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