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SCIENCE QUIZ REVIEW > Electromagnetic > Flashcards

Electromagnetic Flashcards

1
Q

Lowest wavelengths and lowest frequencies of all the electromagnetic waves

A

Radiowaves

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2
Q

Found at the minimum end of the electromagnetic spectrum frequencies ranging from 30 gigahertz to 3 kilohertz

A

Radiowaves

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3
Q

Who discovered radiowaves

A

Heinrich Hertz (late 1880s)

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4
Q

Radiowaves are naturally emitted by lightning and astronomical objects

A

True

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5
Q

Rest smack dab in the middle of radiowaves and infrared waves and have frequency between 3 GHz and 30 THz

A

Microwaves

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6
Q

Who discovered microwaves

A

James clerk Maxwell (1864)

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7
Q

Natural sources such as the sun and the cosmic microwave background (artificial devices such as circuits, transmission towers)

A

True microwaves

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8
Q

Completely invincible to the human eye, they can be felt as heat, frequency from 30 THz to 400 THz

A

Infrared

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9
Q

Who discovered infrared

A

William Herschel (1800)

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10
Q

How do William discovered infrared?

A

He conducted an experiment measuring the difference in temperature between the colors in the visible spectrum , results showed an increase in temperature from blue to red

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11
Q

Any object which has temperature radiates infrared (any object that has temperature above absolute 0)

A

True infrared

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12
Q

Part of the electromagnetic wave spectrum that our human eyes can behold

A

Visible light

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13
Q

Who discovered visible light

A

Isaac Newton (17th century)
Roger Bacon (13th century)

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14
Q

Natural artificial (primarily fluorescent and incandescent tungsten devices in visible light

A

True visible light

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15
Q

Beyond the visible light spectrum, we get into ___ which occurs at high frequencies sending more than 1k trillion cycles every second

A

UltraViolet

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16
Q

Who discovered UltraViolet

A

Johann Ritter (1801)

17
Q

Uv rays and effect In skin
UVC RAYS
UVB RAYS
UVA RAYS

A

UVC - SHORTEST WAVELENGTH do not penetrate on earths ozone layer
UVB - LONGER WAVES
Skin effects like tanning,burning
UVA - EVEN LONGER WAVES
Skin cancer

18
Q

Sunlight is the greatest source of uv radiation

A

True UltraViolet

19
Q

So short that they’ll go flying past a given point at 1 million trillion wavelengths per second

A

X-ray

20
Q

Who discovered x-ray

A

Wilhelm roentgen (1895)

21
Q

Beasts of the electromagnetic spectrum and wield enough power to break the bonds between molecules

A

Gammarays

22
Q

Who discovered gammarays

A

Paul Villard (1900)

23
Q

Gammarays can come from natural sources such as radon gas, radioactive elements in the Earth and cosmic rays

A

True gammarays

SCIENCE QUIZ REVIEW (2 decks)

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