Ray model of light

Question 1

What is a property of light?

Answer 1

Light travels in straight lines

Question 2

What are the three types of beams of light?

Answer 2

Divergent beam
Convergent beam
Parallel beam

Question 3

What is a Divergent beam?

Answer 3

It is a light ray that spreads out over a larger area from a light source

Question 4

What is a Convergent beam?

Answer 4

It’s light rays that move towards a focal point

Question 5

What is a Parallel beam?

Answer 5

It is light rays that travel parallel to each other

Question 6

What is a reflection of light?

Answer 6

The reflection of light is the bouncing of light rays when they hit an object

Question 7

What are the terms in a reflection in light?

Answer 7

Normal
Incident ray
reflected ray
Angle of incidence
Angle of reflection

Question 8

What is a normal in a reflection of light?

Answer 8

It is a line drawn at a right angle to the mirror surface, where the incident ray strikes

Question 9

What is an incident ray in a reflection of light?

Answer 9

It is a light ray that strikes a reflecting surface

Question 10

What is a reflected ray in a reflection of light?

Answer 10

It is a light ray that travels away from a reflecting surface after bouncing off

Question 11

What is an angle of incidence in a reflection of light?

Answer 11

It is the angle between the incident ray and normal

Question 12

What is an angle of reflection in a reflection of light?

Answer 12

It is the angle between the reflected ray and the normal

Question 13

What are the 2 laws of reflection?

Answer 13

-The incident ray, reflected ray and normal at the point of incidence lie on the same place
-The angle of incidence is equal to the angle of reflection

Question 14

What are the two types of objects?

Answer 14

Luminous objects
Non-luminous objects

Question 15

What are the three types of mirrors?

Answer 15

Plane
Convex
Concave

Question 16

What does the image formed on a plane mirror look like?

Answer 16

Same size
Upright
Virtual

Question 17

What does the image formed on a convex mirror look like?

Answer 17

Diminished (becomes smaller)
Upright
Virtual

Question 18

What does the image formed on a concave mirror look like?

Answer 18

Magnified (becomes bigger)
Upright
Virtual

Question 19

What does a plane mirror look like?

Answer 19

It has a flat and smooth reflecting surface

Question 20

What does a convex mirror look like?

Answer 20

-It has a reflecting surface that curves outward
-It spreads out light rays

Question 21

What does a concave mirror look like?

Answer 21

-It has a reflecting surface that curves inwards
-They focus the light rays on a point in front of the mirror

Question 22

What are some characteristics when a light is refracted?

Answer 22

-Light can pass through transparent objects
-Light can travel at different speeds due to different optical densities of the object

Question 23

What are the terms in the refraction of light?

Answer 23

Normal
Incident ray
Refracted ray
Angle of incidence
Angle of refraction

Question 24

What is a normal in a refraction of light?

Answer 24

A line drawn at a right angle to the surface of a medium where the incident ray strikes

Question 25

What is an incident ray in a refraction of light?

Answer 25

A light ray which strikes a surface

Question 26

What is a refracted ray in a refraction of light?

Answer 26

A light ray which undergoes a change in speed

Question 27

What is the angle of incidence in a refraction of light?

Answer 27

The angle between the incident ray and the normal

Question 28

What is the angle of refraction in a refraction of light?

Answer 28

The angle between the refracted ray and the normal

Question 29

Generally, list the states of matter by how optically dense they are from the least to the most optically dense

Answer 29

Gas, liquid, solid

Question 30

What is the emergent ray?

Answer 30

It a ray of light when a refracted ray emerges into the original object

Question 31

What is perceived depth?

Answer 31

It is the distance of the image from the surface of water

Question 32

List, from top to bottom, how would a spectrum be seen in an upright prism

Answer 32

Red Orange Yellow Green Blue Indigo Violet

Question 33

What are the types of radiation?

Answer 33

Visible light Ultraviolet radiation Infrared radiatiom

Question 34

How does visible light impact us?

Answer 34

-Allows plants to carry out photosynthesis to convert carbon dioxide and water into sugars -Allows us to see things around us

Question 35

How does Ultraviolet radiation affect us?

Answer 35

-Exposure to a small amount of Uv radiation encourages our skin to make vitamin D -Used to treat babies with certain medical conditions -An environmentally friendly way to sterilize water, food and medical equipment without using or producing harmful chemicals

Question 36

How does Infrared radiation affect us?

Answer 36

-Infrared technology is useful in healthcare, such as screening people for fever in airports and hospitals

Question 37

What are the harmful effects of Visible light?

Answer 37

-Causes chemical changes in some materials, leading to the deterioration of their quality -Causes light pollution due to excessive artificial light in the surroundings, threatening the lives of animals that use the natural day and night cycles for survival

Question 38

What are the harmful effects of Ultraviolet radiation?

Answer 38

Overexposure to UV radiation can harm our eyes and cause skin cancer

Question 39

What are the harmful effects of Infrared radiation?

Answer 39

-Overexposure to infrared radiation can damage the eyes and skin -Infrared radiation trapped in the atmosphere can cause climate change, leading to an increase in Earth's temperature and changing weather patterns that can harm living things