Question
When all parallel rays reflected from a rough or uneven surface are not parallel, this reflection is called:
This question was previously asked in
RPF Constable 2018 Question Paper PDF (16-Feb-2019) (Shift 2)
The correct answer is
Diffused reflection
Diffused reflection is correct.
On a rough or uneven surface, the normal at each tiny part of the surface points in a different direction. Each ray still obeys the laws of reflection, but because the normals differ, parallel incident rays leave in different directions.
This scattering is called diffused (irregular) reflection. It lets us see objects such as paper or a wall from any side.
Regular reflection happens on smooth surfaces like a plane mirror, where parallel rays stay parallel after reflection.
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Important Questions from Refraction and Reflection
- How can you identify a concave and a convex mirror based on the direction of their reflecting surfaces?
- Stars appear to twinkle in the night sky because ______.
What type of image is always formed by a concave lens, no matter where the object is placed?
- Which of the following is NOT caused by atmospheric refraction?
- According to the sign convention, the height of an erect image formed by a mirror is taken as:
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