electromagnetic spectrum Flashcards

1
Q

Visible light spectrum

A

The segment of the electromagnetic spectrum that the human eye can view.

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2
Q

Visible light

A

The range of wavelengths

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3
Q

Who discovered the electromagnetic spectrum

A

Issac Newton

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4
Q

How was the electromagnetic spectrum discovered

A

Isaac Newton passed a narrow beam of light through a glass prism. As the light exited the prism, Newton could see the colours of the rainbow.

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5
Q

Colours of the electromagnetic spectrum

A
Red
Orange
Yellow
Green
Blue
Indigo
Violet
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6
Q

Dispersion

A

The spliting of white light into colours that make up white light

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7
Q

Dispersion

A

The splitting of white light into colours that make up white light

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8
Q

Each colour has…

A

It’s own wavelength

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9
Q

How are different wavelengths slowed

A

Each wavelength is slowed by glass

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10
Q

What happens when the amount of refraction increases

A

The wavelength decreases

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11
Q

Examples of short wavelengths of light

A

Blue and Violet

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12
Q

Examples of light with longer wavelengths

A

Red and orange

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13
Q

How are rainbows formed

A

Rainbows are formed because rain droplets act as prisms.

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14
Q

The primary colours of the light spectrum

A

Red
Green
Blue

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15
Q

Why are red green and blue called primary colours

A

The three colours can be mixed to produce white light

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16
Q

Secondary colours of light spectrum

A

Yellow
Magenta
Cyan

17
Q

Red+Green(light)

A

Yrllow(light)

18
Q

Red+blue(light)

A

Magenta(light)

19
Q

Green + blue(light)

A

Cyan(light)

20
Q

Cyan+red(light)

A

White light

21
Q

What are cyan and red light called

A

Complementary colours of light

22
Q

What happens when white light falls on an opaque object

A

The object absorbs some of the light and reflects the rest of the light

23
Q

What is the colour of the object determined by

A

The colour that the object appears is determined by the colour that is reflected

24
Q

What colour do transparent objects appear as

A

Transparent objects appear in the colour that they transmit.