How does light travel? What is Light radiation?

How does light travel?

First of all, to learn how light travels,we most know what light is. We have been learning from our schools that, light is a kind of energy which gives the sensation of vision. It's true that due to light we see the things, light coming from the sun reflect from a particular thing and then return to our eye, then only we can recognize the object. So, broadly, what is light? Light is a wave and yes, light is also a particle. Light shows both wave and particle nature. Light is a transverse wave and according to Einstein, it contains photon as a particle or a quanta. As light is a wave, it is a source of energy. According to Planck's the energy of wave is given by,

EM Wave

E = hf

where,

h ---> Planck's Constant

f ---> frequency

So light is a form of energy. Albert Einstein and also Millikan's experiment proved that light consists of particle called photons. Photon is a particle that has no rest mass, meaning that it is always in motion. Photon also travels in a straight path with the light with the speed of 3 x 10^8 .

So, now let's move on to the question. So, how does light travel? light is a transverse wave as well as an electromagnetic wave and electromagnetic wave is the wave in which electric field and magnetic field propagate perpendicularly with each other in a forward direction. It means that neither electric field nor magnetic field disturb the path of light. So, light doesn't require a medium to travel. Light travels from the sun to the earth without the medium as there is vacuum in the space. Light is, moreover, a wave then merely a particle. So, with this we can conclude that light is a transverse wave and an electromagnetic wave which moves in a forward direction such that the electric field and magnetic field are always perpendicular to each other and direction of propagation is also a perpendicular to both the fields.

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