Refraction through a Rectangular Glass Slab
Speed of light in vacuum is:
What is lateral displacement? Draw a ray diagram showing the lateral displacement of a ray of light when it passes through a parallel sided glass slab.
The angle of incidence is equal to the angle of refraction
Velocity of light in glass whose refractive index with respect to air is 1.5 is 2×108ms−1 and in certain liquid the velocity of light found to be 2.5×108ms−1 .The refractive index of the liquid with respect to air is
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) 0∘(b) 45∘ (c) 90∘ (d) 120∘
A ray of light is incident normally on a plane glass slab. What will be (i) the angle of refraction, and (ii) the angle of deviation for the ray?
(a) With the help of a diagram, show how when light falls obliquely on the side of a rectangular glass slab, the emergent ray is parallel to the incident ray. . (b) Show the lateral displacement of the ray on the diagram. (c) State two factors on which the lateral displacement of the emergent ray depends.
A ray of light travelling in water falls at right angles to the boundary of a parallel-sided glass block. The ray of light : (a) is refracted towards the normal (b) is refracted away from the normal (c) does not get refracted (d) is reflected along the same path.
Initially, an object is kept at a distance of from the convex lens and a sharp image is formed at ahead of the lens on the screen. Now a glass plate of and thickness is placed between object and lens. The distance by which the screen be shifted to get a sharp image on the screen will be:
away from the lens
towards the lens
In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab.
(a) Complete the path of the ray till it emerges out of the slab.
(b) In the diagram, mark the angle of incidence (i) and the angle of refraction (r) at the first interface. How is the refractive index of glass related to the angles i and r ?
(c) Mark angle of emergence by the letter e. How are the angles i and e related ?
(d) Which two rays are parallel to each other ?
(e) Indicate in the diagram the lateral displacement between the emergent ray and the incident ray. State one factor that affects the lateral displacement.
A beam of light travelling in a rectangular glass slab emerges into air. Draw a ray-diagram indicating the change in its path.
Draw a labelled ray diagram to show how a ray of light is refracted when it passes : (a) from air into an optically denser medium. (b) from an optically denser medium into air.
Draw a labelled ray diagram to show how a ray of light passes through a parallel sided glass block : (a) if it hits the glass block at 90° (that is, perpendicular to the glass block) (b) if it hits the glass block at an angle other than 90° (that is, obliquely to the glass block).
A water pond appears to be deep. If the refractive index of water is . Determine the actual depth of the pond.
Refractive index of glass is 32. A ray of light travelling in glass is incident on glass-water surface at an angle 30° with normal. Will it be able to come out into the water. Refractive index of water = 43.
A plane mirror is approaching you at 10 cm s−1. Your image shall approach you with a speed of __.
Two isosceles right-angled glass prisms are placed near each other as shown in the following figure:
The path of the light ray entering the first isosceles right-angled glass prism till it emerges from the second identical prism is such that
The light emerges parallel to the incident ray from the second prism
The light takes a 90o turn
The light emerges perpendicular to the incident ray from the second prism
The light takes a 180o turn
A ray of light passes from glass into air, angle of refraction; (a) equal to the angle of incidence (b) greater than the angle of incidence (c) smaller than the angle of incidence (d) 45∘
Why does the pencil appear bent when dipped partially in a beaker containing water?
- Thickness of the slab
- Angle of incidence
- Angle of refraction
- Frequency of light
What path does a ray of light travel when it suffers minimum deviation while passing through an equilateral prism?
The emergent ray travels parallel to the incident ray
The emergent ray travels parallel to the refracted ray
The refracted ray travels parallel to the base of the prism
The emergent ray travels parallel to the base of the prism
The emergent ray travels perpendicular to the base of the prism
- In a straight line
- None of these
- towards the normal
- away from the normal
- parallel to the normal
- away from the emergent ray