A point source of light is placed at a distance h below the surface of a large deep lake. Neglecting the partial reflection of light during refraction, the percentage of light energy that escapes from the water surface is [ 
]
Text Solution
Verified by ExpertsThe correct answer is:
D
17%
Solid angle 
where 
= plane angle
....(1)
from law of refraction
....(2)
from (1) and (2)
total % energy enscaped =17%
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