Light

Question 1

What is incandescent light? Example?

Answer 1

Light that is produced when an object gets hot - Candle , Sun

Question 2

What is fluorescent light? Example?

Answer 2

Electricity is absorbed by mercury in a tube —> produces UV light —> made visible from coating of phosphor- fluorescent light bulb

Question 3

What is phosphorescent light? Example?

Answer 3

An object contains particles that absorb light energy (during day) and will later release the light when it’s dark - glow in the dark stickers

Question 4

What is chemiluminescent light? Example?

Answer 4

A chemical reaction between substances and it gives off light - glow stick

Question 5

What is bioluminescent light? Example?

Answer 5

Chemical reaction in living things that produces light - fireflies

Question 6

What is the different between incandescent and luminescent light?

Answer 6

Incandescent gives off heat - luminescent does not give off heat

Question 7

Know how does the pinhole camera diagram works. how is travels in a straight line.

Answer 7

Light gets forced into a tiny hole, but continues in straight line. This causes an upside down image. Does the outsides go in and cross

Question 8

What is fluorescent light? example?

Answer 8

Electricity is absorbed by mercury in a tube which produces ultraviolet light. The UV is absorbed by the phosphor coding producing visible light.- fluorescent lighting tube

Question 9

What is phosphorescent light? Example?

Answer 9

An object contains particles that absorb light energy during day and will later release the light when it’s dark- glow-in-the-dark stickers

Question 10

What is chemiluminescent light? Example?

Answer 10

A chemical reaction between substances, and it gives off light - glow stick

Question 11

What is bioluminescent light? Example?

Answer 11

Chemical reaction in living things that produce light - fire flies

Question 12

What is the difference between incandescent light and luminescent light?

Answer 12

Incandescent light gives off heat - luminescent does not give off heat

Question 13

How does the pinhole flip the image?

Answer 13

The image has to squeeze into a tiny hole forcing the light to cross, but continue in a straight line. That causes the image to be flipped. Know how to draw this image too.

Question 14

Define transparent

Answer 14

If light passes completely through an object, it’s called transparent

Question 15

Define translucent

Answer 15

If some light passes through an object, it is called translucent

Question 16

Define opaque

Answer 16

If no light passes through an object, it is called opaque

Question 17

What are the seven colours that make up white light?

Answer 17

Red, orange, yellow, green, blue, indigo, violet (ROYGBIV)

Question 18

What colour has the longest wavelength what colour has the shortest wavelength?

Answer 18

Read has the longest wavelength. Violet has the shortest wavelength

Question 19

What are the primary colours of the additive theory?

Answer 19

red, green, blue

Question 20

What are the secondary colours of light?

Answer 20

Cyan, magenta, yellow

Question 21

What does R+G make?

Answer 21

Yellow

Question 22

What does R+B make?

Answer 22

Magenta

Question 23

What does G+B make?

Answer 23

Cyan

Question 24

What colours make white light

Answer 24

R B G or (ROYGBIV)

Question 25

Name 2 types of cells in your eye, and where they can be found in the eye

Answer 25

Cones and rods, on your eyes retina (back of eyes)

Question 26

How many types of cones are there?

Answer 26

3, red, green, blue

Question 27

What are rods?

Answer 27

They help you see in the dark, black and white.

Question 28

What colour do you see when you stare at a red bird?

Answer 28

Cyan

Question 29

What colour do you see when you stare at a green bird?

Answer 29

Magenta

Question 30

What colour do you see when you stare at a blue bird?

Answer 30

Yellow

Question 31

Name the primary colours of subjective theory

Answer 31

CMY (k)

Question 32

Name the secondary colours of subtractive theory

Answer 32

RBG

Question 33

Magenta + cyan equals?

Answer 33

Blue

Question 34

Magenta + yellow =?

Answer 34

Red

Question 35

Yellow + cyan =?

Answer 35

Green

Question 36

Magenta + cyan + yellow =?

Answer 36

Black (K)