MEDIUM
10th CBSE
IMPORTANT
Earn 100

What is the difference in colours of the Sun observed during sunrise/sunset and noon? Give explanation for each.

Important Questions on Human Eye and Colourful World

MEDIUM
10th CBSE
IMPORTANT
Core Science Physics>Chapter 2 - Human Eye and Colourful World>EXERCISE - 2B>Q 20
Give reasons for the following: Colour of clear sky is blue.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 2 - Human Eye and Colourful World>EXERCISE - 2B>Q 20

Give reason.

The sun can be seen about two minutes before actual sunrise.

EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 2 - Human Eye and Colourful World>EXERCISE - 2B>Q 21
To an astronaut, why does the sky appears dark instead of blue?
HARD
10th CBSE
IMPORTANT
Core Science Physics>Chapter 2 - Human Eye and Colourful World>EXERCISE - 2B>Q 1
Explain the refraction of light through a triangular glass prism using a labelled ray diagram. Hence, define the angle of deviation.
MEDIUM
10th CBSE
IMPORTANT
Core Science Physics>Chapter 2 - Human Eye and Colourful World>EXERCISE - 2B>Q 2
How can we explain the reddish appearance of sun at sunrise or sunset? Why does it not appear red at noon?
HARD
10th CBSE
IMPORTANT
Core Science Physics>Chapter 2 - Human Eye and Colourful World>EXERCISE - 2B>Q 3
Explain the phenomenon of dispersion of white light through a glass prism, using suitable ray diagram.
HARD
10th CBSE
IMPORTANT
Core Science Physics>Chapter 2 - Human Eye and Colourful World>EXERCISE - 2B>Q 4
How does refraction take place in the atmosphere? Why do stars twinkle but not the planets?
HARD
10th CBSE
IMPORTANT
Core Science Physics>Chapter 2 - Human Eye and Colourful World>EXERCISE - 2B>Q 5
What is dispersion of white light? What is the cause of such dispersion? Draw a diagram to show dispersion of white light by a glass prism.