If a light ray from air enters three different media in such a way that the refracted angles are 450, 300 and 600 respectively. Identify the right statement with respect to the optical density of these media.
A
Optical density is highest for medium 3.
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B
Optical density is highest for medium 2.
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C
Optical density is least for medium 3.
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D
Optical density is least for medium 2.
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Solution
The correct option is B
Optical density is highest for medium 2.
Angle of incidence i is same for all three media. Angle of refraction for the different media are: rm1=45∘ rm2=30∘ rm3=60∘
Deviation will be highest for medium with highest optical density. Clearly, the deviation is highest (30∘) for Medium 2. Hence, Medium 2 has highest optical density.