EASY
Earn 100

The star appears slightly higher than its actual position when viewed near the horizon.

81.82% studentsanswered this correctly

Important Questions on The Human Eye and the Colourful World

MEDIUM
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
Mention any four phenomena that can be observed due to atmospheric refraction of light on the earth.
MEDIUM
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
State the reason for the sun is visible a little before the actual sunrise and a little after the actual sunset. 
MEDIUM
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction

When Mars is viewed through a telescope it does not appear to twinkle. Comment.

EASY
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
What do you mean by atmospheric refraction?
EASY
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
Because of early sunrise and late sunset, the length of day becomes _____ minutes long. 
EASY
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
Why do stars twinkle?
EASY
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
Why do stars twinkle ? Explain.
EASY
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
A student claims that because of atmospheric refraction, the sun can be seen after it has set, and the day is, therefore, longer than if the earth had no atmosphere.
What does the student mean by saying that the sun can be seen after it has set?
EASY
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
Explain why the planets do not twinkle at night.
MEDIUM
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
Why the sun is seen about two minutes before actual sunrise? Illustrate your answer with neat sketch.
MEDIUM
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
Why do planets not twinkle?
MEDIUM
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
By how much time the day would have been shorter if the earth had no atmosphere?
EASY
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
The atmospheric refraction of light causes the twinkling of:
EASY
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
A student claims that because of atmospheric refraction, the sun can be seen after it has set, and the day is, therefore, longer than if the earth had no atmosphere. Do you think that the students' conclusion is correct?
EASY
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
The stars twinkle but the planets do not twinkle at night because:
MEDIUM
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
Explain why the planets do not twinkle.
EASY
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
We can see the sun before the actual sunrise by about:
EASY
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
Explain why the sun can be seen about two minutes before the actual sunrise. Draw a diagram to illustrate your answer.
MEDIUM
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
Why do stars seem higher than they actually are? Illustrate your answer with the help of a diagram.
EASY
Science>Physics>The Human Eye and the Colourful World>Atmospheric Refraction
The stars appear higher in the sky than they actually are, due to: