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KA S3 Physics > 5. EM Spectrum > Flashcards

5. EM Spectrum Flashcards

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1
Q

What type of wave is every member of the EM spectrum?

A

Transverse

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2
Q

What is the definition of a transverse wave?

A

The wave oscillates perpendicular to the direction it is travelling in.

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3
Q

What is the definition of a longitudinal wave?

A

The wave oscillates in the same direction it is travelling in.

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4
Q

What speed to ALL EM waves travel at?

A

3x108 ms-1

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5
Q

State all the members of the EM spectrum

A

Radiowaves
Microwaves
Infrared
Visible light
Ultraviolet
X-rays
Gamma rays

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6
Q

Which member of the EM spectrum has the highest frequency?

A

Gamma rays

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7
Q

Which member of the EM spectrum has the lowest frequency?

A

Radiowaves

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8
Q

Which member of the EM spectrum has the longest wavelength?

A

Radiowaves

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9
Q

Which member of the EM spectrum has the shortest wavelength?

A

Gamma rays

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10
Q

Which member of the EM spectrum diffracts the most?

A

Radiowaves

Long wavelengths diffract more than short wavelengths.

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11
Q

State a detector of radiowaves

A

Aerials

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12
Q

State a detector of microwaves

A

Aerials

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13
Q

State a detector of infrared

A

Photodiode

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14
Q

State a detector of visible light

A

Photodiode

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15
Q

State a detector of ultraviolet

A

Photographic film

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16
Q

State a detector of x-rays

A

Photographic film

17
Q

State a detector of gamma rays

A

Geiger-muller counter

18
Q

State a medical and an industrial use of radiowaves

A

Medical - MRI machines
Industrial - Submarine communication

19
Q

State a medical and an industrial use of microwaves

A

Medical - Microwave thermotherapy
Industrial - Wi-Fi

20
Q

State a medical and an industrial use of infrared

A

Medical - Detecting inflammation
Industrial - Search and rescue

21
Q

State a medical and an industrial use of visible light

A

Medical - Laser eye surgery
Industrial - Traffic lights

22
Q

State a medical and an industrial use of ultraviolet

A

Medical - treating acne
Industrial - Crime scene investigations

23
Q

State a medical and an industrial use of x-rays

A

Medical - dental x-rays
Industrial - airport security scans

24
Q

State a medical and an industrial use of gamma rays

A

Medical - radiotherapy
Industrial - Detecting pipeline leaks

25
Q

What are the two equations we might use for this topic?

A

d = vt
and
v = f x lambda

26
Q

A radiowave is sent out, reflects off a mirror 40 m away, then returns to the original point.

How would you calculate the time taken to travel from emission to return?

A

DOUBLE THE DISTANCE

d = v x t
so
40 = 3x10-8 ms-1 x t

KA S3 Physics (5 decks)

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