Advertisements
Advertisements
Question
Calculate the speed of light in a medium whose critical angle is 30° ?
Advertisements
Solution
Speed of light in the medium =`\text { Speed of light in air}/ text { Refractive index of the medium with respet to air}`
`=(3 xx 10^8 m/s)/(1/(sin30°)`
`= (3 xx 10^8 m/s)/2`
`=1.5 xx 10^8m/s`
APPEARS IN
RELATED QUESTIONS
Solve the previous problem if the paperweight is inverted at its place so that the spherical surface touches the paper.
Plot a graph between
Angle of incidence versus angle of refraction.
If a ray of light passes from medium I to medium II without any change of direction, what can be said about the refractive indices of these media (angle I is not 0)?
A ray of light incident at an angle of incidence ‘i’ passes through an equilateral glass prism such that the refracted ray inside the prism is parallel to its base and emerges from the prism at an angle of emergence ‘e’.
What can you say about the value of the angle of deviation in such a situation?
Answer the following question.
What are the advantages of optical fibre communication over electronic communication?
Which one of the following is NOT the correct formula for refractive index of glass w.r.t. air (aμg) (i = angle of incidence, r = angle of refraction)
What are the conditions to achieve total internal reflection?
State two differences between normal reflection and total internal reflection.
When the angle of incidence for light going from a denser medium to a rarer medium is exactly equal to the critical angle, the result is:
