science
Grade6
Easy
Question
A parallel beam of light incident on the surface of a wooden block does not contain parallel rays of light after reflection because ____.
- The rays do not obey the laws of reflection
- The surface is irregular
- The rays obey the laws of reflection
- Both 2 and 3
Hint:
When the light falls on a rough wooden surface, the angles of reflections differ for each ray as it is reaching the uneven surface and follows the law of reflection.
The correct answer is: Both 2 and 3
- A beam of light passes onto a rough surface and has various rays that fall unevenly on the surface.
- As the law of reflection says, the rays are reflected off in the opposite direction.
- When each ray reflects off to its opposite directions, the angle of each uneven ray varies.
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