Ch. 2 Geometrical Optics

Question 1

Light

Answer 1

A form of energy

Question 2

Speed of light

Answer 2

3 x 10^8 ms-1

Question 3

How do we know light is energy

Answer 3

Crookes Radiometer

Solar panels

Question 4

Light travels in

Answer 4

Straight lines

Question 5

Beams

Answer 5

Diverging
Parallel
Converging

Question 6

Reflection

Answer 6

The bouncing of light off an object

Question 7

Diffuse Reflection

Answer 7

Rough surface
Scattered in all directions
Most objects

Question 8

Regular reflection

Answer 8

Smooth object
It is reflected off equally
Mirror

Question 9

Plane mirror reflection

Answer 9

Reflected ray
Incident ray
Angle of reflection
Angle of incidence
Normal at the point of incidence

Question 10

Law 1 Reflection of light

Answer 10

The incident ray, the normal at the point of incidence and the reflected ray all lie on the same plane

Question 11

Law 2 Reflection of light

Answer 11

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Question 12

Virtual image

Answer 12

The apparent intersection of light rays and can’t be formed on a screen

Question 13

Real image

Answer 13

The actual intersection of light rays and can be formed on a screen

Question 14

Lateral inversion

Answer 14

Objects seem wrong way around in a mirror

Question 15

Parallax

Answer 15

The apparent movement of one object relative to another due to the motion of the observer.