EASY
7th ICSE
IMPORTANT
Earn 100

Many television sets and computer monitors produce the range of colours on monitor by the use of red, green and blue light emittimg phosphors. Why?

Important Questions on Light Energy

EASY
7th ICSE
IMPORTANT
Lakhmir Singh's Science Physics>Chapter 4 - Light Energy>EXERCISES>Q 1

Choose the correct option.

 The angle of incidence on a plane mirror is 30°. The angle of reflection will be:

EASY
7th ICSE
IMPORTANT
Lakhmir Singh's Science Physics>Chapter 4 - Light Energy>EXERCISES>Q 2
Which of the following will produce a diffuse reflection of light?
A. Plane mirror
B. Piece of paper
C. Still water in a lake
D. Leather bag
EASY
7th ICSE
IMPORTANT
Lakhmir Singh's Science Physics>Chapter 4 - Light Energy>EXERCISES>Q 3
If you stand 1 m infront of a plane mirror, how far away would you see yourself in the mirror?
EASY
7th ICSE
IMPORTANT
Lakhmir Singh's Science Physics>Chapter 4 - Light Energy>EXERCISES>Q 4
The image formed on plane mirror is:
EASY
7th ICSE
IMPORTANT
Lakhmir Singh's Science Physics>Chapter 4 - Light Energy>EXERCISES>Q 5
Which one of the following is the best reflector of light?
EASY
7th ICSE
IMPORTANT
Lakhmir Singh's Science Physics>Chapter 4 - Light Energy>EXERCISES>Q 6
The plane mirror forms a:
EASY
7th ICSE
IMPORTANT
Lakhmir Singh's Science Physics>Chapter 4 - Light Energy>EXERCISES>Q 7
The interchange of left and right between an object and its image is called:
EASY
7th ICSE
IMPORTANT
Lakhmir Singh's Science Physics>Chapter 4 - Light Energy>EXERCISES>Q 8
The primary colours are: