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Define refraction and state the laws of refraction.
Select from the following the best experimental setup for tracing the path of a ray of light passing through a rectangular glass slab.
(a) P
(b) Q
(c) R
(d) S
Why do we get a spectrum of seven colors when white light is dispersed by a prism?
Draw a ray diagram to show the refraction of a monochromatic ray through a prism when it suffers minimum deviation
Write a relationship between the angle of incidence and angle of refractions for a given pair of media
A light ray in passing from water to a medium
(a) speeds up
(b) slows down. In each case, give one example of the medium.
The refractive index of air with respect to glass is expressed as `""_g μ_a=sin i /sin r`.
- Write down a similar expression for aμg in terms of the angles i and r.
- If angle r = 90°, what is the corresponding angle i called?
- What is the physical significance of the angle i in part (b)?
In what condition a prism is said to be in the position of minimum deviation? What is the direction of the refracted ray inside the prism in this condition?
A ray of monochromatic light is incident from the air on a glass slab:
(i) Draw a labelled ray diagram showing the change in the path of the ray till it emerges from the glass slab.
(ii) Name the two rays that are parallel to each other.
(iii) Mark the lateral displacement in your diagram.
