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Science > Light > Flashcards

Light Flashcards

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1
Q

What is incandescent light? Example?

A

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

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2
Q

What is fluorescent light? Example?

A

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

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3
Q

What is phosphorescent light? Example?

A

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

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4
Q

What is chemiluminescent light? Example?

A

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

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5
Q

What is bioluminescent light? Example?

A

Chemical reaction in living things that produces light - fireflies

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6
Q

What is the different between incandescent and luminescent light?

A

Incandescent gives off heat - luminescent does not give off heat

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7
Q

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

A

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

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8
Q

What is fluorescent light? example?

A

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

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9
Q

What is phosphorescent light? Example?

A

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

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10
Q

What is chemiluminescent light? Example?

A

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

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11
Q

What is bioluminescent light? Example?

A

Chemical reaction in living things that produce light - fire flies

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12
Q

What is the difference between incandescent light and luminescent light?

A

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

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13
Q

How does the pinhole flip the image?

A

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.

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14
Q

Define transparent

A

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

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15
Q

Define translucent

A

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

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16
Q

Define opaque

A

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

17
Q

What are the seven colours that make up white light?

A

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

18
Q

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

A

Read has the longest wavelength. Violet has the shortest wavelength

19
Q

What are the primary colours of the additive theory?

A

red, green, blue

20
Q

What are the secondary colours of light?

A

Cyan, magenta, yellow

21
Q

What does R+G make?

A

Yellow

22
Q

What does R+B make?

A

Magenta

23
Q

What does G+B make?

A

Cyan

24
Q

What colours make white light

A

R B G or (ROYGBIV)

25
Q

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

A

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

26
Q

How many types of cones are there?

A

3, red, green, blue

27
Q

What are rods?

A

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

28
Q

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

A

Cyan

29
Q

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

A

Magenta

30
Q

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

A

Yellow

31
Q

Name the primary colours of subjective theory

A

CMY (k)

32
Q

Name the secondary colours of subtractive theory

A

RBG

33
Q

Magenta + cyan equals?

A

Blue

34
Q

Magenta + yellow =?

A

Red

35
Q

Yellow + cyan =?

A

Green

36
Q

Magenta + cyan + yellow =?

A

Black (K)

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