Apparent position of a star

Q. What is advanced sunrise and delayed sunset?

Q. Explain in brief the reason for each of the
following:
(a) Advanced Sun-rise
(b) Delayed Sun-Set
(c) Twinkling of stars

Q. Rakesh has to reach school by $9AM$. If he observes the sunrise at $5:58AM$. What amount of the time he has left to reach school from actual sunrise ?

1. $3hours2minutes$
2. $3hours$
3. $2hours58minutes$
4. $2hours56minutes$

Q. Name the phenomenon that causes the twinkling of stars in a clear sky.

1. Atmospheric refraction
2. Dispersion of light
3. Reflection of light
4. Scattering of light

Q.

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

1. 20 minutes

2. 2 minutes

3. 5 minutes

4. 2 hours

Q.

Why sun appears before the sun rise and after the sunset. Explain with diagram

Q. The Sun is visible for 2 minutes after the sunset. Which of the following factors determine the amount of delay?

1. Size of the Earth
2. Dispersion of sunlight
3. Thickness of the atmosphere

Q. The sun appears to us ________ minutes earliear than the actual sunrise and ________ minutes later than the actual sunset.

1. 3, 2
2. 2, 3
3. 3, 3
4. 2, 2

Q.

Which phenomena do we observe on Earth that is not caused due the Earth's atmosphere?

1. Red sun
2. Blue sky
3. Early sunrise
4. Day & night

Q. Choose the correct option:

Assertion (A): There is a time delay between actual sunrise and apparent sunrise.
Reason (R): When light travels from air to water, it deviates from its original path.

1. Both A and R are true, and R is the correct explanation of A.
2. Both A and R are true, but R is not the correct explanation of A.
3. A is true, but R is false.
4. A is false, but R is true.

Q. Choose the correct option:

Assertion (A): There is a time delay between actual sunrise and apparent sunrise.
Reason (R): When light travels from air to water, it deviates from its original path.

1. Both A and R are true, and R is the correct explanation of A.
2. Both A and R are true, but R is not the correct explanation of A.
3. A is true, but R is false.
4. A is false, but R is true.

Q. Mike observes the sunset at 6:02 p.m. What is the actual time when the Sun is at the horizon?

Q. The sun appears to us ________ minutes earliear than the actual sunrise and ________ minutes later than the actual sunset.

1. 3, 2
2. 2, 3
3. 3, 3
4. 2, 2