Question

Path of light is ______

Answer 1

Light, also known as visible light, is electromagnetic radiation that falls within the part of the electromagnetic spectrum that the human eye can detect. Between the infrared and ultraviolet, visible light is classified as having wavelengths in the 400–700 nm range.

Complete step-by-step answer:
Once light is formed, it will continue to flow in a straight line until it collides with something else.
Light travels in straight lines, as seen by shadows. An object prevents light from reaching the surface where the shadow is seen. Before it reaches the object, light occupies the whole vacuum, but the whole area between the object and the surface is in darkness. Since some light reaches the surface after being bounced from other surfaces, shadows do not seem completely black.
Light is absorbed, bounced (bounces off), dispersed (bounces off in both directions), refracted (direction and speed changes), or emitted until it collides with another surface or objects (passes straight through).
In a uniform composition medium like glass, the direction of light is straight and the velocity of light is constant. As light passes through another medium, such as air or water, its direction and velocity change. At the boundary, or interface, of two surfaces, light changes its direction and velocity.
When light travels from its source to your eye, its direction will vary dramatically. It's helpful to note that the path is reversible when analysing it. You can change the trajectory and take the same route from glass to air to water if you trace the path from water to air to glass. The use of this reversibility principle allows you to put your light path theories to the test.

Note: Albert Einstein suggested in 1905 that light is made up of billions of tiny energy packets known as photons. Although these photons have no mass, they do have a certain amount of energy that is determined by their wavelength (number of vibrations per second). A wavelength is always assigned to each photon. Photons with shorter wavelengths provide more energy.