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Grade: 11
        refractive index for water and glycerine are 1.33 and 1.47 respectively.what is critical angle for light ray going from later to former?
2 years ago

Answers : (2)

Arun
23487 Points
							
Dear Student
 
When ray passes through denser to rarer medium.
Angle of refraction is greater than angle of incidence.
When a ray of light passes from glycerine(denser) to water (rarer medium)
Then frim Snell's law-
sin i/sin r = \mu
 
2 years ago
Arun
23487 Points
							
Sin i/ sin r = \mu1 /\mu2
When r = 90°, 
Angle of incidence is called critical angle.
i.e.,
i = \thetac
 
Then
\thetac = sin-1 (1.33/1.47)
\thetac = 64° 48'
 
Regards
Arun (askIITians forum expert)
2 years ago
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