EASY
10th CBSE
IMPORTANT
Earn 100

What is persistence of vision?

Important Questions on The Human Eye and the Colourful World

MEDIUM
10th CBSE
IMPORTANT
SCIENCE [PHYSICS] Class-10>Chapter 5 - The Human Eye and the Colourful World>Summative Assessment>Q 12
Why is the colour of the clear sky blue?
MEDIUM
10th CBSE
IMPORTANT
SCIENCE [PHYSICS] Class-10>Chapter 5 - The Human Eye and the Colourful World>Summative Assessment>Q 13
What happens to the image distance in the eye when we increase the distance of an object from the eye?
MEDIUM
10th CBSE
IMPORTANT
SCIENCE [PHYSICS] Class-10>Chapter 5 - The Human Eye and the Colourful World>Summative Assessment>Q 14
The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?
MEDIUM
10th CBSE
IMPORTANT
SCIENCE [PHYSICS] Class-10>Chapter 5 - The Human Eye and the Colourful World>Summative Assessment>Q 15
Give reasons for the following:
The sun can be seen about two minutes before actual sunrise.
MEDIUM
10th CBSE
IMPORTANT
SCIENCE [PHYSICS] Class-10>Chapter 5 - The Human Eye and the Colourful World>Summative Assessment>Q 15

Give reasons for the following:

We cannot see an object clearly if it is placed very close to the eyes.

MEDIUM
10th CBSE
IMPORTANT
SCIENCE [PHYSICS] Class-10>Chapter 5 - The Human Eye and the Colourful World>Summative Assessment>Q 16
How do you account for the red colour of the sun during sunrise and sunset?
MEDIUM
10th CBSE
IMPORTANT
SCIENCE [PHYSICS] Class-10>Chapter 5 - The Human Eye and the Colourful World>Summative Assessment>Q 17
The sun near the horizon appears flattened at sunset and sunrise. Explain why?
MEDIUM
10th CBSE
IMPORTANT
SCIENCE [PHYSICS] Class-10>Chapter 5 - The Human Eye and the Colourful World>Summative Assessment>Q 18
The sun is visible to us about two minutes before actual sunrise and about two minutes after the actual sunset. Give reasons.