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# Learn Financial Freedom Step by Step

## Definition of Light

Light is the energy in the form of electromagnetic radiation. It goes in the straight line. Like sound, it is in wave form. Sound is the wave of mechanical vibration but Light is electromagnetic vibration. Sound needs any medium for reaching one place from other place but light can goes in vacuum also.

Do you see the bike or car when it is in motion. You can say it is moving bike or it is moving car because its speed catch with your eyes because bike or car normal goes with the speed of 60 kms / hour but you can not catch the speed of light because it is very high speed and it is very more than the speed of catching by your eyes. Know learn the

## Speed of Light

Speed of light is 2997,92,458 meter per second or 186282 mile per second or 3 Lakh kilometre per second or 3 X 10^8 meter/second. This is the highest speed in this universe. Speed of Sound is just 343 meter per second. Human capacity to see light is just 430 to 450 terahertz. More and under light is not visible.

## Sources of Energy

Sources of light energy are sun, fire and electric energy.

## Visible  Light and Invisible Light

All lights, we can not see only specific wavelength, frequency and energy light, we can see

Wavelength = centimetre 7 X 10 ^ -5

Frequency = in hertz = 4.3 X 10^ 14

Energy in electron volt = 2-3

Other light which is not visible will be invisible light

like radio wave, micro wave , infrared , uv, x ray, gamma

Video Tutorial

## Ashok Kumar's Contents\$type=blogging\$show=https://www.svtuition.com/p/ashok-kumar.html\$hide=author

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