Chapter 5: Ray Model of Light

Question 1

Characteristics of a plane mirror

Answer 1

• The image is of the same size of the object
• The image is upright
• The image is virtual
• The image is laterally inverted
• The distance between the image and the mirror is equal to the distance between the object and the mirror.

Question 2

What is the relationship between the angle of incidence and the angle of reflection?

Answer 2

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

Question 3

Convex mirror characteristics

Answer 3

The image formed is a virtual image.
The image is formed behind the convex mirror.
The image formed is smaller than the object.
The image is an upright and erect image.
It has a curve outward

Question 4

Characteristics of a concave mirror

Answer 4

It has a curve inward
They form virtual, upright and magnified images. They are commonly used when a magnified image is needed.

Question 5

Uses for convex mirrors

Answer 5

Convex mirrors can be found at road junctions to allow drivers to see around blind corners, giving them more time to respond to oncoming traffic

They are also installed at corners of shops to allow shopkeepers to see a large area of the shop in a single location.

Question 6

Concave mirror uses

Answer 6

Dentists use concave mirrors to form a magnified image of the teeth, it allows them to examine the teeth closely

Question 7

Most optically dense to least optically dense is…

Answer 7

Glass, water, air

Question 8

Does the ray of light bend towards the normal or away from the normal if the ray of light is travelling from an optically less dense to an optically denser environment?

Answer 8

It slows down and bends towards the normal.

Question 9

Does the ray of light bend towards the normal or away from the normal if the ray of light is travelling from an optically denser to an optically less dense environment?

Answer 9

Its speed increases and bends away from the normal.

Question 10

White light is made of 7 colours. Name them

Answer 10

Red, yellow, orange, yellow, green, blue, indigo, violet.

Question 11

Since red light travels the fastest, does it bend the most or does it bend the least?

Answer 11

Bends the least

Question 12

Since violet travels the slowest, does it bend the most or bend the least?

Answer 12

It bends the most

Question 13

What is the process called when white light is split into the 7 primary colours?

Answer 13

Dispersion