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Question
A ray of light is incident on a medium at an angle 60°. The angle of refraction is different for different mediums for an angle of incidence = 60∘.
In which medium is the speed of light lowest?
A ray of light is incident on a medium at an angle 60°. The angle of refraction is different for different mediums for an angle of incidence = 60∘.
In which medium is the speed of light lowest?
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Solution
The correct option is C 3
The angles of refraction for the different media are:
Medium 1 = 60∘, medium 2 = 45∘, medium 3 = 30∘.
As we know, light while entering a denser medium from a rarer medium, gets slowed down which is why it bends towards the normal and vice-versa.
So, using this concept, the densest medium is medium 3 as light bends by the maximum amount in medium 3.
Therefore, the speed of light is minimum in medium 3.
3
The angles of refraction for the different media are:
Medium 1 = 60∘, medium 2 = 45∘, medium 3 = 30∘.
As we know, light while entering a denser medium from a rarer medium, gets slowed down which is why it bends towards the normal and vice-versa.
So, using this concept, the densest medium is medium 3 as light bends by the maximum amount in medium 3.
Therefore, the speed of light is minimum in medium 3.
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