Question

What is light what is its nature what is the speed of light in vacuum? what is a mirror? what is a focal length of a plane mirro?

Answer 1

Light is an electromagnetic wave which has different wavelength. Speed of light in vacuum is 3*10^3 m/s.
A mirror is a plane surface which reflects light and image of a thing. Focal length of a plane mirror is infinity.

Answer 2

Answer:Light is an electromagnetic wave which has different wavelength. Speed of light in vacuum is 3*10^3 m/s.

A mirror is a plane surface which reflects light and image of a thing. Focal length of a plane mirror is infinity.

Explanation:

1. Light is always thought as a form of matter before and just made of particles a long time ago, but then scientists discovered that light is actually a wave, specifically a type of electromagnetic wave. Basically, it is made of photon particles that behave like waves and known as the wave-particle duality.
2. Light is considered as a universal constant and the fastest thing in the universe, it travels at approximately 300,000 kilometers per second in a vacuum of space.