What do we mean by Natural Luminous?
Give an example.

What is Artificial Luminous?
Give an example.

What is Non-Luminous?
Give an example.

Why do we see black?

What is white light made up of?

What is Dispersion?

What is refraction?

What material allows SOME light rays to pass?

What material allows ALL light rays to pass?

Which material does NOT allow light rays to pass?

What do shadows prove to us?

What is a mirror?

What is a Plane Mirror?

What is a Concave Mirror?

What is a Convex Mirror?

Concave Lens

Convex Lens

Cornea

Iris

Pupil

Lens

Retina

Optic Nerve