The Light & Sound

The Light & Sound

In Early 1669s, A Mathematician and Physicist named "Isaac Newton" gives knowledge about with experiment of "Sunlight and Prisms". he said that the clear white light was the combination of seven visible colors. After that, A Scientist-Astronomer "Christiaan Huygens" in 1960. And give further explanation wave theory of light.

The Light & Sound

it is electromagnetic radiation that appears the properties of both waves and particles. that's known as the form of energy. And light also keeps the earth warm. light has energy called photons in the packet's form. every kind of light has a direction, spectrum and polarization,  wavelength/frequency. light speed moves according to frequency speed. And the Gamma Rays, X-Rays, Microwaves, and Radio waves are a form of light.

The light bulb

in 1879, the first light bulb was invented by an American Businessman, Inventor, and Engineer "Thomas Edison" in New Jersey. And that time the light bulb was known as "Glass Vacum Bulb".


The Sound is a kind of energy made by vibrations.  whenever an object or any physical thing vibrates that causes movement in surrounding air molecules.


It is known as flactuation in "pressure", "stress", "particle" "displacement",  "velocity of particle", and  etc.

The discovery of Sound

The Sound discovered by the great scientist of the world "Galileo Galilei". raised the degree of the science of the study of vibration and the correlation b/w "pitch" and "frequency" of sound vibration.

Types of Sounds

1. Longitudinal Waves

2. Mechanical Waves

3. Pressure Waves

Longitudinal waves

The founder of the longitudinal waves was given by a French Physicist, and mathematician named "Louis Malus".

This is the type of Sound wave that consists of a periodic disturbance or Vibration and takes place in the same direction as the advance of the wave.

Mechanical wave

In 1860, The Mechanical Wave was discovered by the Scottish Scientist "James Clerk Maxwell". Who see that the electrical fields and magnetic fields can couple together to form electromagnetic.

 It is growing through the material medium "Solid, Liquid, and Gas", at a wave speed that depends on the elastic, and inertial properties of that medium.

Pressure Wave

This is the type of Sound wave. the mechanical wave that results from the back and forth vibration of the elements of the medium by which the wave is moving. Pressure waves make a disturbance in the material medium.