what is refraction? what are their causes
Answers
Answer:
Defination:
Refraction is the phenomenon of bending of light at the boundary of two mediums.
causes:
Refraction is caused due to the change in speed of light when it enters from one medium to another.
e.g., 1. when light goes from air into water it bends towards the normal because there is a reduction in its speed
2. when light goes from water to air it bends away from the normal because three is an increase in speed of light.
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Answer:
Explanation:
This change of direction is called refraction. When light enters a more dense substance (higher refractive index), it 'bends' more towards the normal line. The amount of bending depends on two things: Change in speed – if a substance causes the light to speed up or slow down more, it will refract (bend) more.