Which of the following is true about the aphelion?

1. Occurs on 4 July.
2. Summer in northern hemisphere
3. Speed of revolution is maximum
4. All of the above.

Assertion (A): The speed of revolution of the earth is uniform.

Reason (R): When the earth is closer to the sun, the gravitational pull makes the earth move faster than when it is away from the sun.

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

Name the phenomenon when the regions beyond the Arctic Circle experience 24 hours daylight.

1. Daylight sun
2. Midnight sun
3. Arctic sun
4. Regional sun

The period of diffused light between sunset and complete darkness is called ……………. .

1. dawn
2. dusk
3. twilight
4. Both (2) and (3)