Optics

Question 1

Light is a form of [1] that travels in the form of [2]

Answer 1

1. Energy
2. Electromagnetic Waves

Question 2

Define electromagnetic specture.

Answer 2

The entire range of light that exists

Question 3

Light is measured in [1] length or [2]

Answer 3

1. Wave
2. Frequency

Question 4

What is wave length? What unit of measurment is used?

Answer 4

Wave length is the distance between two succesive wave crests. It is measured in nanometres.

Question 5

What is frequency? What unit of measurement is used?

Answer 5

Frequency is the number of waves that pass through a given point per second. It is measured in hertz.

Question 6

Name the electromagnetic spectrum, weakest to stronkest.

Answer 6

Radio Waves (wtf who still uses radios), Microwaves (ramen), Infared light (light but heat), UV rays (enemy of sunscreen), X-Ray (broken wrist), Gamma Rays (3rd letter of the alphabet in greece)

Question 7

What is color blindness?

Answer 7

Color blindness occurs when there is a problem with the pigments in certain nerve cells of the eye that sense color called cones (ice cream).

Question 8

Where are cone cells found?

Answer 8

Cone cells are found in the light sensitive layer of tissue at the back of your eye known as your retina.

Question 9

What is incandescent light?

Answer 9

Incandescent light is produced by an object at very high temperatures (think how you see your crush hehe).

Question 10

What is fluorescent light?

Answer 10

Produced when ultraviolet radiation is applied to substances (uv rays react with stuf and light go brrr)

Question 11

What is chemiluminesence?

Answer 11

Light produced by chemical reactions. Typically very little heat, referred to as cool light. (Chemistry + Magic = Light)

Question 12

What is phosphorecent light?

Answer 12

Excited atoms store their energy. Glow in the dark objects.

Question 13

What is bioluminesence?

Answer 13

Light produced by plants and animals. Form of chemiluminesence

Question 14

What is triboluminesence?

Answer 14

Light produced from the friction of crystals (if you take two quartz crystals and rub them together, it will produce light).

Question 15

What is electric discharge?

Answer 15

Light produced by electrical currents that pass through air and gas (lights passing through neon gas)

Question 16

What is the law of reflection?

Answer 16

Angle of incidence = Angle of reflection

Question 17

Angle of incidence = [?]

Answer 17

Angle of reflection

Question 18

Light always travels in a [1] line called [2].

Answer 18

1. Straight
2. Rays

Question 19

[?] always travels in a straight line called rays.

Answer 19

Light

Question 20

The use of [1] when it [2] an object is called [3] optics.

Answer 20

1. Light rays
2. hits
3. Geometric

Question 21

In diagrams, light rays are shown as a [1] + [2] to represent the [3] and [4] the light is travelling. This is known as the [5] model of light.

Answer 21

1. Line
2. Arrow
3. Direction
4. Path
5. Ray

Question 22

What are incident rays?

Answer 22

Incident rays are rays colliding with a surface (not after a collision)

Question 23

Depending on the surface, when light rays strikes it can: [1], [2] or [3]

Answer 23

1. Bounce off (reflection)
2. Be absorbed
3. Pass through

Question 24

What is reflection?

Answer 24

Reflection is when light bounces off a surface.

Question 25

What are reflected rays?

Answer 25

Reflected rays are light rays that have bounced off a surface.

Question 26

What is a transparent object?

Answer 26

Most or all light passes through an object.

Question 27

What is a translucent object?

Answer 27

Some light passes through and some is reflected or absorbed.

Question 28

What is the index of refraction?

Answer 28

n = c/v
n = index of refraction
c = speed o. light in a vacccum
v = speed of light in the material.

Question 29

What does opaque mean?

Answer 29

Little to no light passes through and is reflected or absorbed instead.

Question 30

What is a mirror?

Answer 30

Any polished surface reflecting all light.

Question 31

What is a plane mirror?

Answer 31

Flat reflective surface

Question 32

What is the normal line?

Answer 32

The normal line is an imaginary line perpendicular to the surface that light is being reflected or refracted on

Question 33

What is the angle of incidence?

Answer 33

Angle between incident ray and normal line

Question 34

What is the angle of reflection?

Answer 34

Angle between the reflected ray and the normal line

Question 35

What is a ray box?

Answer 35

A ray box is a metal or plastic that contains a lamp. Used to investigate the properties