Atmospheric Refraction, Class 10 Science NCERT Solutions

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. Stars appear to be higher in the sky than actually they are because of

scattering of light

dispersion of light

atmospheric reflection

atmospheric refraction

Question 1 of 10

2. The cold air layers of the atmosphere behave as optically

Either inactive or rarer medium

Denser medium

Rarer medium

Inactive medium

Question 2 of 10

3. How much time from sunrise to sunset is lengthened because of atmospheric refraction?

4 hours

2 minutes

4 minutes

2 hours

Question 3 of 10

4. Sun appears to be risen before the actual sun rise because of

 

 

 

Atmospheric dispersion

Atmospheric refraction

Scattering of light

Atmospheric reflection

Question 4 of 10

5. The sun can be seen before the actual sunrise by about

2 minutes

4 minutes

20 minutes

1 minute

Question 5 of 10

6. By how much time is the sunset delayed due to atmospheric refraction?

2 minutes

5 minutes

20 minutes

2 hours

Question 6 of 10

7. To an observer on Earth the stars appear to twinkle. This is due to

the fact that stars do not emit light continuously.

frequent absorption of star light by earth's atmosphere.

the fluctuation of physical conditions in the earth's atmosphere.

frequent absorption of star light by their own atmosphere.

Question 7 of 10

8. Why does Sun appear slightly oval shaped at morning and evening?

The rays of light from upper edge of the sun have to pass maximum thickness.

Due to unequal bending of light.

The rays of light from the lower edges of Sun are refracted more.

All the above.

Question 8 of 10

9. Deviation of light as it passes through the atmosphere due to variation in air density is called

atmospheric dispersion

atmospheric reflection

atmospheric refraction

atmospheric scattering

Question 9 of 10

10. When light rays from stars enter into earth's atmosphere, it travels from

denser to rarer medium

rarer medium to vacuum

rarer to denser medium

denser medium to vacuum

Question 10 of 10

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