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Optics > Chapter 4 Key Words > Flashcards

Chapter 4 Key Words Flashcards

0
Q

Crest

A

Highest point in a wave

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1
Q

Amplitude

A

Height of the crest or the depth of a trough.

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2
Q

Energy

A

The ability to do work

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3
Q

Frequency

A

Number of repetitive motions that occur in a given time

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4
Q

Trough

A

The lowest point in a wave

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5
Q

Wave

A

A way of transferring energy through matter or space, without causing any permanent displacement

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6
Q

Wavelength

A

The distance of one complete wave: crest to crest or trough to trough.

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7
Q

Light

A

A natural agent that stimulates sight and makes things visible

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8
Q

Reflection

A

When light strikes an object and it bounces off

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9
Q

Refraction

A

When light bends or changes direction as it changes speed

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10
Q

Spectrum

A

Seven colour categories of visible light that are together

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11
Q

Visible light

A

Light that you can see

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12
Q

Wave model of light

A

Light is a type of wave that travels through empty space snd transfers energy

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13
Q

Electromagnetic spectrum

A

(EM) energy that is carried, or radiates, in the form of waves that range in length from short to long; xrays, ultraviolet rays, visible light, microwaves and radio waves

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14
Q

Radio waves

A

Longest wavelength, AM radio is 1 km long. Examples: AM/ FM radio, tv/ cell phone, MRI

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15
Q

Microwaves

A

A type of radio wave, about 1 km long. Examples: Microwave oven , communication

16
Q

Infrared waves

A

About 1000 waves can fit into 1 cm. Emitted by living things & warm objects. Ex: heat lamps, remote controls

17
Q

Visible waves

A

ROYGBIV. Examples: artificial light, lazers

18
Q

Ultraviolet waves

A

1M waves fit in 1 cm, needed to make vitamin d, can cause skin cancer. Examples: skin tanning, kill bacteria

19
Q

X rays

A

100 M waves fit in 1 cm, passes through skin but not bones. X ray photos, airport security

20
Q

Gamma rays

A

Shortest wavelength. 10 B waves in one cm. Examples: radiation therapy, study galaxies

21
Q

What is the acronym for the EM spectrum?

A

Rainbow may invite violent unicorns with X-ray goggles (RMIVUXG) : radio, microwaves, infrared, visible, ultraviolet, X-ray and gamma

Optics (3 decks)

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