Question

Choose the correct option:

Assertion (A): There is a time delay between actual sunrise and apparent sunrise.
Reason (R): Scattering of light is the phenomenon in which light gets diffused on striking the dust particles, water droplets etc.

• A. Both A and R are true, and R is the correct explanation of A.
• B. Both A and R are true, and R is not the correct explanation of A.
• C. A is true, but R is false.
• D. A is false, but R is true.

Answer 1

The correct option is B Both A and R are true, and R is not the correct explanation of A.

Since we have an atmosphere which has a higher refractive index as compared to vacuum so, the sunlight entering the atmosphere bends and we see the apparent sunrise two minutes before the actual sunrise (the actual crossing of the Sun with respect to horizon).

Scattering of light is the phenomenon in which light rays get deviated from its straight path on striking an obstacle like dust or gas molecules, water vapours etc. Scattering of light gives rise to many spectacular phenomena such as Tyndall effect and the red colour to sun during sunrise and sunset.