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Grade: 11 
        
A fish in water, looks upward at an unobstructed overcast sky. what total angle does the sky apper to substend?
10 months ago

Answers : (1)

Arun
14776 Points 
							
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)
10 months ago
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