Question

Define the following terms :-
1. solar day
2. mean solar day​

Answer 1

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Mᴇᴀɴ Sᴏʟᴀʀ Dᴀʏ

The time between two successive passages of the mean sun across the meridian at noon. It is equal to 24 hours 3 minutes and 56.555 seconds of mean sidereal time.

Sᴏʟᴀʀ Dᴀʏ

A solar day is the time it takes for the Earth to rotate about its axis so that the Sun appears in the same position in the sky. ... Although a simple definition of a day is the time it takes for a planet, satellite or other celestial body to complete one rotation about its axis, two alternative definitions exist.