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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?

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?

Grade:11

2 Answers

Arun
25763 Points
3 years ago
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
 
Arun
25763 Points
3 years ago
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)

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