Why does light always travel in a straight line path?

According to the Photon theory of light, light consists of small particles called "Photons".

These photons are particles that have momentum like normal particles.

So these photons travel in straight lines unless there is an external force that acts on them.  

Tutorialspoint

Simply Easy Learning

Updated on: 10-Oct-2022

141 Views

Kickstart Your Career

Get certified by completing the course

Get Started