MEDIUM
8th ICSE
IMPORTANT
Earn 100

A ray of light is incident at an angle i on the surface of a glass slab. If its angle of refraction inside the glass block is r, then find the relation between i and r assuming that light enters from the air and emerges into air.

Important Questions on Light Energy

MEDIUM
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q G
Explain why two prisms placed next to each other such that their adjacent faces are parallel, behave like a glass slab.
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q H
Give reason for the following: Concave mirrors are also known as converging mirrors.
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q H
Give reason for the following.
Concave mirrors used by dentists.
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q H
Give a reason for the following. 
Convex mirrors preferred over plane mirrors as rearview mirrors in cars.
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q H
Give reason for the following.
Stars twinkle in the sky.
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q H
Give reason for the following.
The coin immersed in water appears to be raised.
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q I
If the speed of light in glass is 2×108 m s-1 and that in air is 3×108 m s-1, calculate the refractive index of glass with respect to air.
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 5 - Light Energy>Exercises>Q I
The speed of light in a transparent medium is 2.44×108 m s-1. Find the refractive index of the medium. (Take the speed of light in air is 3×108 m s-1)