EASY
10th CBSE
IMPORTANT
Earn 100

Twinkling of stars is due to atmospheric
(a)dispersion of light by water droplets
(b)refraction of light by different layers of varying refractive indices
(c)scattering of light by dust particles
(d)internal reflection of light by clouds

50% studentsanswered this correctly

Important Questions on The Human Eye and the Colourful World
EASY
10th CBSE
IMPORTANT
The clear sky appears blue, because

EASY
10th CBSE
IMPORTANT
Which of the following statements is correct regarding the propagation of light of different colour of white light in air?

EASY
10th CBSE
IMPORTANT
The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light

EASY
10th CBSE
IMPORTANT
Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?

EASY
10th CBSE
IMPORTANT
The bluish colour of water in deep sea is due to

EASY
10th CBSE
IMPORTANT
When light rays enter the eye, most of the refraction occurs at the

EASY
10th CBSE
IMPORTANT
The focal length of the eye lens increases when eye muscles

MEDIUM
10th CBSE
IMPORTANT
Which of the following statements is correct?
