Physics

Air pressure is measured in Pascal.

James Clerk Maxwell made the efforts for the unification of electricity, magnetism and optics field of Physics.

Electrons carry current in a good conductor of electricity and they are negatively charged. This makes a good electrical conductor negatively charged.

The optical fibre is a device which works on the principle of total internal reflection by which light signals can be transmitted from one place to another with a negligible loss of energy.

In 1905, Albert Einstein determined that the laws of physics are the same for all non-accelerating observers, and that the speed of light in a vacuum was independent of the motion of all observers. This was the theory of special relativity.

It follows the wave path near the tropopause at elevations of 8 km to 15 km, this statement is not correct.

Electricity is measured in units of power called Watts, named to honour James Watt, the inventor of the steam engine.

One can distinguish a telescope from a microscope by observing length and size of the lens.

A body moving in a circular path with a constant speed has a constant kinetic energy.

Kilowatt-hour is the unit of energy.