optics

Question 1

Angle of Incidences

Answer 1

The angle formed between the normal and the incident ray at the point of incidence

Question 2

Angle of reflection

Answer 2

The angle between the reflected ray and the normal

Question 3

The Normal

Answer 3

The perpendicular line to a mirror surface

Question 4

Incident ray

Answer 4

The incoming ray that strikes the surface

Question 5

Reflected ray

Answer 5

The ray that bounces off a reflected surface

Question 6

Focus

Answer 6

The point at which the light rays parallel to the principal axis converge when they are reflected off a concave mirror

Question 7

Principal Axis

Answer 7

The line through the center o the curvature to the midpoint of the mirror

Question 8

Object

Answer 8

The thing that has a physical existence

Question 9

Image

Answer 9

Reproduction of an object through the use of light

Question 10

Specular reflection

Answer 10

the reflection of light off a smoother surface

Question 11

Diffuse reflection

Answer 11

reflection of light off an irregular or dull surface

Question 12

SALT characteristics – for mirrors only

Answer 12

Diverging (Convex mirrors)
ALWAYS- Smaller, upright, behind the mirror, virtual

Question 13

Object is beyond C (mirror)

Answer 13

Smaller, inverted, between C & F, Real

Question 14

Object is at C (mirrors)

Answer 14

Same size, inverted, at C, real

Question 15

Between C&F (Mirrors)

Answer 15

Larger, inverted, outside C, real

Question 16

Object at F (mirrors)

Answer 16

No clear image formed

Question 17

Object inside F (mirrors)

Answer 17

Larger, Upright, Behind the mirror, Virtual

Question 18

hyperopia

Answer 18

• People with hyperopia can see distant objects but not nearby objects
• Hyperopia is also known as far-sigtedness
• A converging lens can be used to correct this
  problem

Question 19

presbyopia

Answer 19

Eye error that comes with aging when you’re older. You can correct this with reading glasses.

Question 20

myopia

Answer 20

• People with myopia can see nearby objects but not distant objects
• Myopia is also known as nearsightedness
• A diverging lens can be used to correct this
  problem, negative meniscus, concave lens

Question 21

apparent depth

Answer 21

Apparent depth is the assumption that an object is at shallower depth due to refraction. you must aim deeper because our eyes perceive light rays to go in straight lines. the rays from the tip of the object will enter our eyes. which will then send the rays backward to create an image that is shallower than the submerged object

Question 22

refraction

Answer 22

the bending or change in direction of light when it travels from one medium into another

Question 23

rules for diverging mirror

Answer 23

1. a ray parallel to the principal axis is reflected as if it has come through the focus (F)
2. a ray aimed at the centre of curvature (C) is reflected back upon itself
3. a ray aimed at the focus (F) is reflected parallel to the principal axis

Question 24

rules for diverging lens

Answer 24

1. A ray parallel to the principal axis is refracted as if it had come through the principal focus, (F)
2. A ray that appears to pass through the secondary principal focus, (F’), is refracted parallel to the principal axis.
3. A ray through the optical centre, (O), continues straight through without being

Question 25

rules for converging mirror

Answer 25

1. a light ray parallel to the principal axis is reflected through the focus. This is how the focus is defined.
2. a ray through (F) will reflect parallel to the principal axis
3. a ray aimed at the vertex will follow the law of reflection

Question 26

rules for converging lens

Answer 26

1. A ray parallel to the principal axis is refracted through the principal focus, (F)
2. A ray through the secondary principal focus, (F’), is refracted parallel to the principal axis.
3. A ray through the optical centre, (O), continues straight through without being refracted.