science
Grade-7
Easy
Question
During normal incidence, the light ray goes ___.
- Perpendicular to the normal
- Parallel to the normal
- At 60 degrees to the normal
- At 45 degrees to the normal
Hint:
In normal incidence the ray is perpendicular to the surface.
The correct answer is: Parallel to the normal
The correct option is Parallel to the normal.
When the incident ray falls on the normal at 90 degrees it doesn't bend and travels straight which makes it parallel to the normal. This is only true when the incident ray is perpendicular to the normal.
If the ray is not perpendicular to the surface, the ray will appear to bend at the surface.
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