General

General

Easy

Question

# During normal incidence on a glass slab, the angle of incidence = ____.

- The angle of refraction
- The angle of emergence
- Both a and b
- None of the above

Hint:

### All angles are 0° from normal.

## The correct answer is: Both a and b

- When a ray of light falls on a glass slab normally, the angle between normal and incident ray is zero.
- Therefore, angle of refraction and emergence will also be zero.
- So, the correct option is
**c.** **
****
**

**c.**

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