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Chem > Chem 110 part 1 > Flashcards

Chem 110 part 1 Flashcards

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1
Q

What is light?

A

Electromagnetic radiation

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2
Q

The distance a wave travels in one cycle

A

Wavelength

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3
Q

Number of cycles a wave undergoes in one second

A

Frequency

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4
Q

One half the height of a wave from peak to trough

A

Amplitude

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5
Q

The distance a wave moves per unit of time

A

Speed

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6
Q

Wavelength and frequency are ______?

A

Inversely proportional

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7
Q

Equation for the speed of a ware

A

Wavelength x frequency

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8
Q

Unique properties of a wave (3)

A
  1. waves undergo refraction from one medium to another 2.waves bend around an object 3. interference of waves can result in diffraction
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9
Q

What kinds of diffraction are there?(2)

A

Constructive and destructive

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10
Q

Which 3 major observations concerning matter and light could not be described by a classical definition?

A

Blackbody radiation, photoelectric effect, and atomic spectra

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11
Q

What is the concept that declares everything at a temperature emits radiation with the same shape curve, just shifted to shorter wavelength as things get warmer (making things visible when hot)

A

Blackbody radiation

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12
Q

What is a theoretical ideal model that absorbs all radiation falling on it-a perfect absorber or emitter

A

A blackbody

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13
Q

The theoretical models in blackbody radiation as functions of temperature fit the observed experimental blackbody curves well at_______ wavelengths, but showed significant discrepancies at _______ wavelengths. This was known as the ______catastrophe.

A
  1. Longer
  2. Shorter
  3. Ultraviolet
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14
Q

Who derived a mathematical expression to describe the phenomenon of blackbody radiation by theorizing that energy only assumed certain values?

A

Max Planck

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15
Q

Energy is _____when it only assumes certain values?

A

Quantized

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16
Q

According to Photoelectric effect, when will light eject electrons off of a metal surface?

A

When its frequency was increased past its threshold frequency

17
Q

According to Einstein, what depends on the threshold frequency (concerning photoelectric effect)?

A

Work function

18
Q

Light comes in packets called what?

A

Photons

19
Q

In the interaction of light and matter, what is unique to and characteristic of each element?

A

Spectra

Chem (1 decks)

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