Radiation Flashcards

1
Q

What’s the name for waves that can travel through space?

A

Electromagnetic Radiation

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2
Q

Why are they called electromagnetic radiation waves?

A

They travel through electromagnetic fields, rather than matter

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3
Q

What is radiation?

A

Energy that travels in all directions

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4
Q

What are EM waves organized on?

A

Their wavelength

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5
Q

What’s the order of EM waves from longest wavelength to shortest?

A
Radio wave 
Micro wave
Infrared
Visible light 
Ultraviolet
X-ray
Gamma Ray
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6
Q

What is long-wave radiation?

A

EM radiation with wavelength over 1 micrometer

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7
Q

What are the examples of long-wave radiation?

A

Infrared, microwaves, radio waves

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8
Q

What are the properties of long-wave radiation?

A

High wavelength, and low frequency and energy

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9
Q

Which EM radiation has the greatest wavelength?

A

Radio waves

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10
Q

What’s radio astronomy?

A

The study of radio waves given off by objects in space, like planets stars and galaxies

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11
Q

What produces radio waves?

A

Lightning, humans for radio communication, radar, and tv broadcasting

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12
Q

What was the cosmic microwave background?

A

Light left over from the Big Bang. Oldest light in the universe

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13
Q

What is the highest energy form of long wave radiation?

A

Infrared

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14
Q

IR is the primary source of what on earth?

A

Thermal energy

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15
Q

What is IR produced by?

A

Stars due to nuclear fusion

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16
Q

What is shortwave radiation?

A

EM radiation with wavelength below 1 micrometer

17
Q

What are shortwave properties?

A

High frequency and energy

Lower wave length

18
Q

What are the examples of shortwave radiation

A

Visible light, UV light, x-rays and gamma rays

19
Q

Whats the highest energy form of EM radiation

A

Gamma rays

20
Q

What can gamma rays pierce

21
Q

How are gamma rays produced?

A

When atoms split or fuse to another nucleus

Occurs in stars
Man made nuclear weapons and power plants

22
Q

Where do gamma rays come from

A

Super and hypernovae

23
Q

What are X-rays ideal for?

A

Medical imaging and security screening

24
Q

Where are X-rays produced?

A

Quasars and black holes

25
Where is UV light produced
Massive stars
26
What can UV rays enter
Skin cells Can only pass through the first cell layers
27
What does UV light produce
Vitamin D
28
What can too much UV radiation result in
DNA mutation | Cancer
29
What’s the wavelength of visible light
400-700 nanometers
30
What is visible light produced by
Hot objects (Stars)
31
What’s the most dangerous form of radiation?
Ionizing
32
What does ionizing radiation do?
Separates electrons from the nucleus
33
What’s are the 2 common forms of ionizing radiation
X-rays and gamma rays
34
What does ionizing radiation cause
Burns, radiation sickness, cancer