Reflection And Refraction

Question 1

What is the 4 characteristics of light? Explain them.

Answer 1

1. Transmission is the process where the light through a substance, allowing it to continue traveling on the other side
2. Reflection is the process of light bouncing back as it hits a surface
3. Refraction is the bending of light as it enters a different medium as it transmits
4. Absorption is the light taken in by a material and converted into another energy

Question 2

Law of reflection

Answer 2

Incidence angle = refracted angle

Question 3

What is a normal? and what is it for?

Answer 3

An imaginary line 90* from the boundary. It is used in reflection and refraction as a guideline

Question 4

What is specular reflection?

Answer 4

A reflection that produce clear images because it’s boundary is flat

Question 5

What is diffused or scattered reflection?

Answer 5

A reflection that doesn’t produce clear image because the boundary is bumpy so the normals are all different.

Question 6

State the refraction direction when it travels from less dense to denser material

Answer 6

It bends towards the normal line

Question 7

What is critical angle?

Answer 7

When the refracted angle is 90*, the incidence angle is a critical angle