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Grade: 12th pass

                        

consider a tank made of glass (refractive index 1.5) with a thick bottom. It is filled with a liquid of refractive index μ. A student finds that irrespective of what the incident angle is for a beam of light entering the liquid, the light reflected from the glass interface is never completely polarised. For this to happen, the minimum value of μ is √5 /√3 3/√5 5/√3 4/3 plz explain also

5 months ago

Answers : (2)

Vikas TU
12278 Points
							
Dear student 
C
Sin C
1/mu
sin ib = ( 1 )
root ( mu ^ 2 + 1.5 ^ 2 )
mu ^ 2 + 1.5 ^2
mu 3/ root 5
5 months ago
Vikas TU
12278 Points
							
C is less than ib and c is criticle angle 
Sin c less than Sin ib a
Tan ib = mu ref = 1.5/mu
1/mu is less than 1.5 /root mu^2 + root(1.5)^2 
sin ib = 1 
root (mu^2) +1.5^2) is less than mu*1.5 
mu^2 + 1.5^2 is less than (mu*1.5)^2 
mu less than 3/ root5 
5 months ago
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