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A fish in water, looks upward at an unobstructed overcast sky. what total angle does the sky apper to substend?

A fish in water, looks upward at an unobstructed overcast sky. what total angle does the sky apper to substend?

Grade:11

1 Answers

Arun
25763 Points
3 years ago
Critical angle
C = sin^-1 (1/mu)
C = sin^-1( 1/sqrt(2) )
C = 45°
 
Total angke does the sky appear to subtend
Theta = 2*C = 90°
 
 
Regards
Arun (askIITians forum expert)

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