Q1.
A ray of light passes from a medium X to another medium Y. No refraction of light occurs if the ray of light hits the boundary of medium Y at an angle of:
(a) \( 120^{o}\)
(b) \( 90^{o}\)
(c) \( 45^{o}\)
(d) \( 0^{o}\)
Q2.
A transparent medium A floats on another transparent medium B. When a ray of light travels obliquely from medium A to B, the refracted ray bends away from the normal. Which of these two media is optically denser and why?
Q3.
A coin placed at the bottom of a tank appears to be raised when water is poured into it. Explain.
Q4.
For the same angle of incidence of 45°, the angle of refraction in two transparent media P and Q is 20° and 30° respectively. Which medium is denser out of P and Q and why?
Q5.
Speed of light in water is \(2.25\times 10^{8}\;ms^{-1}\) and speed of light in glass is \(2\times 10^{8}\;ms^{-1}\). If light is entering from water to glass, Which medium has a higher optical density among water and glass?
Q6.
Light does not travel in the same direction in all media. What causes the direction of propagation of light to change in a medium?
Q7.
A ray of light incident obliquely on a face of a rectangular glass slab placed in air emerges from the opposite face parallel to the incident ray. Draw a labelled diagram to show this phenomenon.
Q8.
Draw a ray diagram to show the path of a ray of light travelling from an optically denser medium to an optically rarer medium.
Q9.
The picture shows the path of light as it travels from one medium to another:
What could be medium 1 and medium 2?
Q10.
What is lateral displacement? Write two factors on which it depends on.
