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Light and Optics Grade 8 > Colours of Light > Flashcards

Colours of Light Flashcards

1
Q

What are the Additive Primary Colours of light

A

The Additive Primary Colours of light are Red, Green and Blue

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2
Q

(Additive) Red + Green = __________

A

Yellow

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3
Q

(Additive) Red + Blue = ____________

A

Magenta

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4
Q

(Additive) Green + Blue = _________

A

Cyan

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5
Q

(Additive) Red + Green + Blue = ___

A

White

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6
Q

What are the Subtractive Primary Colours of Light?

A

The Subtractive Primary Colours of light are Magenta, Cyan and Yellow

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7
Q

(Subtractive) Magenta pigment + Cyan pigment = ___________________

A

Blue

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8
Q

(Subtractive) Magenta pigment + Yellow pigment = _________________

A

Red

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9
Q

(Subtractive) Cyan pigment + Yellow pigment = _________________

A

Green

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10
Q

(Subtractive) Magenta pigment + Cyan pigment + Yellow pigment = _____

A

Black

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11
Q

What does the Additive Theory refer to?

A

The Additive Theory of colour refers to the fact that by adding different amounts of light, you can create any desired colour

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12
Q

In Additive Theory can you start with no light (black)?

A

Yes, in Additive Theory, you start with no light (black) and keep adding different amounts of these colours can create any desired colour

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13
Q

Why are the primary colours of the Additive Theory Red, Green and Blue?

A

The 3 Additive primary colours are Red, Green and Blue because addition of these colours can create any desired colour.

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14
Q

Does the human eye use Additive or Subtractive Theory?

A

The human eye uses Additive Theory to perceive light (RGB cones). Computer/phone screens also create any desired colour by using different amounts of Red, Green and Blue pixels

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15
Q

What does the Subtractive Theory refer to?

A

The Subtractive Theory of Colour refers to the fact that by removing different amounts of light, you can create any desired colour

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16
Q

In Subtractive Theory can you start with a full spectrum (white)?

A

In the Subtractive Theory, you can start with a full spectrum (white), and keep adding pigments to remove (absorb) different wavelengths of light until you get the desired colour

17
Q

Why are the primary colours of the Subtractive Theory Cyan, Magenta and Yellow?

A

The 3 Subtractive Theory colours are Cyan, Magenta and Yellow because the removal of different amounts of these colours can create any desired colour.

18
Q

Where is Subtractive Theory used?

A

Subtractive Theory is used in paintings (when you mix different paints, you are mixing different paints, you are mixing different pigments to remove different wavelengths of light through the process of absorption (so that only the desired colour is reflected)). Subtractive Theory is also used in printing

Light and Optics Grade 8 (12 decks)

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