Home
Class 12
PHYSICS
A ray of light incident on face AB of an...

A ray of light incident on face `AB` of an equilateral glass prism, shows minimum deviation of `30@` .Calculate the speed of light through the prism.

Text Solution

Verified by Experts

Here, `A = 60^(@), delta_(m) = 30^(@), v = ?`
`mu = (sin (A + delta_(m))//2)/(sin A//2) = (sin (60^(@) + 30^(@))//2)/(sin 60^(@)//2)`
`= (sin 45^(@))/(sin 30^(@)) = (1//sqrt(2))/(1//2) = (2)/(sqrt(2)) = sqrt(2) = 1.414`
From `mu = ( c)/(v)`,
`v = (c )/(mu) = (3 xx 10^(8))/(1.414)m//s = 2.12 xx 10^(8) m//s`
Promotional Banner

Topper's Solved these Questions

  • OPTICS

    PRADEEP|Exercise Very short answer question|5 Videos

  • OPTICS

    PRADEEP|Exercise very short answer questions|1 Videos

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    PRADEEP|Exercise Competition Focus (Multiple Choice Questions)|2 Videos

Similar Questions

Explore conceptually related problems

A ray of light incident on face AB of an equilateral glass prism, shows minimum deviation of 306@ .Calculate the speed of light through the prism.

(i) A ray of light incident on face AB of an equilateral glass prism, shows minimum deviation of 30^(@) . Calculate the speed of the light through the prism. (ii) Find the angle of incidence at face AB so that the emergent ray grazes along the face AC.

A ray of incident on an equilateral prism shows minimum deviation of 30^(@) .The speed of light through the prism is ?

If minimum deviation = 30^(@) , then speed of light in shown prism will be

A ray of light incident at 49^(@) on the face of an equilaternal prism passes symmetrically. Calculate the refractive index of the material of the prism.

A ray of light incident at an angle 90° with the face of an equilateral prism passes symmetrically. Calculate the refractive index of the material of the prism