Geometric Optics

Question 1

Reflection

Answer 1

Light rays, “incident rays”, collide with an object and later these rays bounce in another direction, “reflected rays”

Specular - reflected in the same direction
Diffuse - reflected in different directions

Question 2

Law of Reflection

Answer 2

The angle of incidence is always equal to the angle of reflection.

Question 3

Refraction

Answer 3

Bending of a ray when it passes at an angle from one medium into another in which its speed is different.

Question 4

Angle of Refraction

Answer 4

The angle between a refracted ray and the normal drawn at the point of incidence to the interface at which refraction occurs.

Question 5

Mirror

Answer 5

Reflective smooth surface that bounces off light.

Types:
Plane
Convex - curved outwards
Concave - curved inward

Question 6

Lenses

Answer 6

A transparent material that refracts light rays in such as way to for an image.

Types:
Convex Lens - thicker across the middle
Concave Lens - thinner across the middle