English

Name Two Effects Produced by the Atmospheric Refraction.

Advertisements
Advertisements

Question

Name two effects produced by the atmospheric refraction.

Advertisements

Solution

(a) The twinkling of stars is produced by atmospheric refraction.
(b) Advanced sunrise and delayed sunset are also effects produced by atmospheric refraction.

shaalaa.com
  Is there an error in this question or solution?
Chapter 3: The Human Eyes And The Colorful World - Exercise 5 [Page 173]

APPEARS IN

Lakhmir Singh Physics Part 1 [English] Class 10
Chapter 3 The Human Eyes And The Colorful World
Exercise 5 | Q 2. | Page 173

RELATED QUESTIONS

Explain why the planets do not twinkle.


Name the phenomenon which causes the twinkling of stars.


Atmospheric refraction causes advance sunrise and delayed sunset. By how much time is: 

sunrise advanced?


Atmospheric refraction causes advance sunrise and delayed sunset. By how much time is: 

sunset delayed?


State whether the following statement is true or false:
The planets twinkle at night due to atmospheric refraction of light.


Fill in the following blank with suitable word:
We can see the sun about ................ minutes before the actual sunrise and about ................ minutes after the actual sunset because of atmospheric ................


The atmospheric refraction of light causes the twinkling of:
(a) planets only
(b) stars only
(c) planets and stars
(d) stars and satellites


The stars appear higher in the sky than they actually are, due to:
(a) diffraction of light
(b) scattering of light
(c) refraction of light
(d) reflection of light


The stars twinkle but the planets do not twinkle at night because:
(a) the stars are small but the planets are large
(b) the stars are very large but planets are small
(c) the stars are much nearer but planets are far off
(d) the stars are far off but planets are nearer to earth


Due to atmospheric refraction of sunlight, the time from sunrise to sunset is lengthened by about:
(a) 6 minutes
(b) 2 minutes
(c) 4 minutes
(d) 5 minutes


The day is longer on the earth by about 4 minutes because:
(a) the earth is round in shape
(b) the earth rotates on its axis
(c) the earth revolves around the sun
(d) the earth has atmosphere

 


By how much time the day would have been shorter if the earth had no atmosphere?


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.

  1. What does the student mean by saying that the sun can be seen after it has set?
  2. Do you think that the students’ conclusion is correct?

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?


A star sometimes appears brighter and some other times fainter. What is this effect called? State the reason for this effect.

 

 

The stars appear higher from horizon than they actually are. Explain why it is so.


Explain the refraction of light through a triangular glass prism using a labelled ray diagram. Hence define the angle of deviation.


How does refraction take place in the atmosphere? Why do stars twinkle but not the planets?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×