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9 physics end of years > electromagnetic spectrum > Flashcards

electromagnetic spectrum Flashcards

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1
Q

what is the electromagnetic spectrum?

A

continuous range of wavelengths

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2
Q

what is the mnemonic to remember the electromagnetic spectrum?

A

Real Men Inevitably Visit Ugly eX Girlfriends

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3
Q

what is the order of the EMS? highest frequency/lowest wavelength → lowest frequency/highest wavelength

A 
Radio waves
microwaves
infrared
visible light
ultraviolet
xrays
gamma rays
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4
Q

what is the general use of radio waves?

A

television signals

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5
Q

what is the general use of microwaves?

A

mobile phones and heating up food

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6
Q

what is the general use of infrared?

A

optical fibre communication

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7
Q

what is the general use of visible light?

A

to see everything

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8
Q

what is the general use of UV?

A

tanning, checking fake bank notes

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9
Q

what is the general use of xrays?

A

seeing images of bones

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10
Q

what is the general use of gamma rays?

A

killing cancer cells

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11
Q

why can we only see the bones in xrays?

A

the bones absorb more light than the skin does or the tissue does.

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12
Q

dangers of radio waves?

A

there are no dangers because it is the lowest frequency and highest wavelength

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13
Q

dangers of microwaves?

A

internal heating of the body cells

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14
Q

dangers of infrared?

A

damages skin cells and causes burns

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15
Q

dangers of visible light?

A

can cause blindness

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16
Q

dangers of ultraviolet?

A

can cause skin cancer and harmful to eyes

17
Q

dangers of xrays?

A

can cause cancer and cell mutation

18
Q

dangers of gamma rays?

A

can cause cancer cell mutation

19
Q

What are the sources of radio waves?

A

Transmitter aerial

20
Q

What are the sources of microwaves?

A

Magnatron and transmitter aerial

21
Q

What are the sources of infrared?

A

Hot objects

22
Q

What are the sources of Visible light?

A

Lamp, fire

23
Q

What are the sources of Uv?

A

UV lamp, sun

24
Q

What are the sources of X-rays?

A

Hot metal

25
Q

What are the sources of gamma rays?

A

Radioactive materials

9 physics end of years (6 decks)

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