Principles of Special Theory of Light

PRINCIPLE-1

Colloquial Statement: if we are in unaccelerated vehicle, its motion has no effect on the way things happen inside it.

Formal Statement: The laws of physics are same in all unaccelerated reference frames.

PRINCIPLE-2

The motion of light is not affected by motion of source of light.

what does MWe mean? what does the 'e' stand for?

M- Mega ; W-Watt; e-Electrical

Unit used to denote power level in Power Plants.

It is used to denote Electrical Power Generation by Power. It is denoted so as to differentiate it from thermal power generated. Not all thermal power can be converted into electrical but it depends on efficiency of plant.