Advertisements
Advertisements
Question
Write the relation between the refractive index and critical angle for a given pair of optical media?
Solution
`""^a μ_b= 1/(sin C)` where, a and b are the rarer and denser media respectively. C is the critical angle for the given pair of optical media.
APPEARS IN
RELATED QUESTIONS
In the given figure PQ and PR are the two light rays emerging from an object P. The ray PQ is refracted as QS.
- State the special name given to the angle of incidence ∠PQN of the ray PQ.
- What is the angle of refraction for the refracted ray QS?
- Name the phenomenon that occurs if the angle of incidence ∠PQN is increased.
- The ray PR suffers partial reflection and refraction on the water-air surface. Give reason.
- Draw in the diagram the refracted ray for the incident ray PR and hence show the position of image of the object P by the letter P’ when seen vertically from above.
Write the necessary conditions for the phenomenon of total internal reflection to
occur ?
Plot a graph between
Angle of incidence versus angle of refraction.
How does a ray of light bend when it travels from denser to rarer medium.
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?
What is meant by the term ‘critical angle’?
Which of the following statements about total internal reflection is true?
What are the conditions to achieve total internal reflection?
A ray of light passes through a prism of refractive index `sqrt2` as shown in the figure. Find:
- The angle of incidence (∠r2) at face AC.
- The angle of minimum deviation for this prism.
- Assertion (A): Propagation of light through an optical fibre is due to total internal reflection taking place at the core-cladding interface.
- Reason (R): Refractive index of the material of the cladding of the optical fibre is greater than that of the core.
