6, 7, 8 Flashcards

1
Q

Wavelength

A

distance between corresponding points on adjacent waves

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2
Q

Frequency

A

number of waves passing a given point per unit of time

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3
Q

The longer the wavelength,

A

the smaller the frequency

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4
Q

The shorter the wavelength,

A

the higher the frequency

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5
Q

Amplitude

A

one-half the heigh of the wave from peak to trough

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6
Q

Light

A

electromagnetic radiation (visible or non-visible)

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7
Q

Electromagnetic radiation

A

form of energy that has wave characteristics

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8
Q

Electromagnetic radiation propagates through a vacuum at this speed

A

2.998 x 10^8 s^-1

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9
Q

All electromagnetic radiation travels at the same velocity of

A

the speed of light

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10
Q

Constructive interference

A

peaks or troughs from one wave coincide with peaks or troughs of the other

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11
Q

Destructive interference

A

peaks (troughs) from one wave coincide with troughs (peaks) of the other

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12
Q

Waves can only form if they have a what? (quantization)

A

integer number of half-wavelengths

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13
Q

The maxima blackbody curves shift to shorter wavelengths as

A

temperature increases

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14
Q

Example of maxima blackbody curves shifting to shorter wavelengths as temperature increases

A

heated metals going from black to dark red, to brighter red, to white hot

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15
Q

Photoelectric effect

A

light striking a metal surface is viewed as particles (photons) not waves

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16
Q

Energy is what to frequency?

A

proportional

17
Q

Photoelectric effect came from whom?

A

Einstein

18
Q

Where did Einstein’s photoelectric effect explanation come from?

A

Planck’s quantized energies

19
Q

Laws of physics dictate

A

energy loss with motion, thus complete annihilation