Physics
Assertion (A): A ray of light travelling from a rarer medium to a denser medium, slows down and bends away from the normal.
Reason (R): The speed of light is higher in a rarer medium than in a denser medium.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
Refraction Plane Surfaces
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Answer
assertion is false but reason is true.
Explanation
Assertion (A) is false. When a ray of light travels from a rarer medium to a denser medium, it slows down and bends towards the normal. This is due to the change in speed and direction of light when it crosses the boundary between two different mediums, which is known as refraction.
Reason (R) is true. The speed of light is higher in a rarer medium (e.g., air) compared to a denser medium (e.g., glass or water). This difference in speed is what causes the refraction of light when it passes from one medium to another.
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