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RadPhy > Electromagnetic Energy > Flashcards

Electromagnetic Energy Flashcards

1
Q

Disturbance that travels through space and time

A

Wave

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2
Q

Transfer enegy from one place to another

A

Wave motion

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3
Q

Continuing of an electric field developing magnetic field

A

Electromagnetic waves

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4
Q

Continuous group of waves

A

Wave train

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5
Q

Describes a smooth repetitive oscillation

A

Sine wave / sinusoid

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6
Q

Distance from one crest to another

A

Wavelength

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7
Q

Half the height from the peak of a crest to the lowest point of the wave

A

Amplitude

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8
Q

Product of frequency and wavelength

A

Velocity

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9
Q

Unit for velocity

A

Meter per second (m/s)

Miles per sec

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10
Q

Speed of light ( electromagnetic wave travels )

A

3x10^ 8 m/s

186 000 mi/s

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11
Q

Number of oscillationd per unit time

A

Frequency

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12
Q

Frequency is identified as

A

Cycles per second

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13
Q

Frequency is represented by

A

Nu (v)

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14
Q

Unit of measurement for frequency

A

Hertz

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15
Q

Wavelength is represented by

A

Lambda (A)

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16
Q

Unit of measurement in wavelength

A

Angstrom (A)

Nanometer (nm)

17
Q

1 A

A

1x 10^-10 m

18
Q

1 nm

A

10 A

19
Q

1nm

A

10^-9 m

20
Q

Frequency and wavelength are

A

Inversely proportional

21
Q

Frequency and energy of photon are

A

Proportional

22
Q

All energy is transmitted and absorbed in discrete particles called photons

A

Quantum theory

23
Q

Energy disturbances moving through space

A

Photons

24
Q

Interaction among energy, force or mass

A

Field

25
Q

Energy of thephoton varies with

A

Frequency

26
Q

Energy =

A

Planck’s constant (h) x frequency

27
Q

Planck’s constant

A
  1. 626 x 10^-34 joules-second

4. 135 x 10^-15 electron volt-sec

28
Q

1 joule

A

6.24 x 10^18 eV

29
Q

1 ev

A

1.6 x 10^-19 J

30
Q

1 erg

A

1 x10^7 J

31
Q

1 erg (2)

A

6.24 x 10^11 eV

RadPhy (9 decks)

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