Light 2

Question 0

In reflection;

Answer 0

a light ray strikes a smooth surface, such as a mirror, and bounces off. A reflected ray always comes off the surface of a material at an angle equal to the angle at which the incoming ray hit the surface.

Question 1

What are three well-known phenomena of light?

Answer 1

reflection, refraction and scattering

Question 2

Scattering

Answer 2

When light strikes a rough surface, incoming light rays reflect at all sorts of angles because the surface is uneven.

Question 3

scattering occurs in many of the objects we encounter every day;

Answer 3

The surface of paper is a good example. You can see just how rough it is if you peer at it under a microscope. When light hits paper, the waves are reflected in all directions. This is what makes paper so incredibly useful – you can read the words on a printed page regardless of the angle at which your eyes view the surface.

Question 4

Refraction occurs when:

Answer 4

a ray of light passes from one transparent medium (air, let’s say) to a second transparent medium (water). When this happens, light changes speed and the light ray bends, either toward or away from what we call the normal line, an imaginary straight line that runs perpendicular to the surface of the object.

Question 5

The amount of bending, or angle of refraction, of the light wave depends on:

Answer 5

how much the material slows down the light. Diamonds wouldn’t be so glittery if they didn’t slow down incoming light much more than, say, water does. Diamonds have a higher index of refraction than water, which is to say that those sparkly, costly light traps slow down light to a greater degree.

Question 6

Continue with ELECTROMAGNETISM

Answer 6

A