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Question

What is light according to Einstein?

Why does it follow rectilinear propogation? Why does it what to acquire the shortest distance between two points? And what is that that gives energy to the light particles to gain motion??

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Solution

Dear student,

Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is the visible spectrum that is visible to the human eye and is responsible for the sense of sight
  1. Rectilinear~ means straight.
  2. Propagation~ means travelling of light.

Light travels in a straight path. This property of Light is called Rectilinear Propagation of Light in Physics.

Experiment~

  1. Take a piece of chart paper and roll it like a calendar.
  2. You'll be able to see the other side if you hold one end of the rolled paper to your eye.
  3. However, if you bend the rolled paper and then try to see the other end, you won't be able to do that.
  4. This proves that light travels in a straight path.

Light energy is a kind of kinetic energy with the ability to make types of light visible to human eyes. Light is defined as a form of electromagnetic radiation emitted by hot objects like lasers, bulbs, and the sun.

Light contains photons which are minute packets of energy. When an object’s atoms get heated up, it results in the production of photons and this is how photons are produced. The electrons find excitement from the heat and results in earning extra energy. The energy is released in the form of a photon and more photons come out as the substance gets hotter.

Light travels in the form of a wave when it travels. However, no matter is essential to carry the energy along to travel. This is the reason why light can travel through space where there is no air.

Regards

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