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Flashcards in Electromagnetic Energy Deck (31):
1

Disturbance that travels through space and time

Wave

2

Transfer enegy from one place to another

Wave motion

3

Continuing of an electric field developing magnetic field

Electromagnetic waves

4

Continuous group of waves

Wave train

5

Describes a smooth repetitive oscillation

Sine wave / sinusoid

6

Distance from one crest to another

Wavelength

7

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

Amplitude

8

Product of frequency and wavelength

Velocity

9

Unit for velocity

Meter per second (m/s)
Miles per sec

10

Speed of light ( electromagnetic wave travels )

3x10^ 8 m/s
186 000 mi/s

11

Number of oscillationd per unit time

Frequency

12

Frequency is identified as

Cycles per second

13

Frequency is represented by

Nu (v)

14

Unit of measurement for frequency

Hertz

15

Wavelength is represented by

Lambda (A)

16

Unit of measurement in wavelength

Angstrom (A)
Nanometer (nm)

17

1 A

1x 10^-10 m

18

1 nm

10 A

19

1nm

10^-9 m

20

Frequency and wavelength are

Inversely proportional

21

Frequency and energy of photon are

Proportional

22

All energy is transmitted and absorbed in discrete particles called photons

Quantum theory

23

Energy disturbances moving through space

Photons

24

Interaction among energy, force or mass

Field

25

Energy of thephoton varies with

Frequency

26

Energy =

Planck's constant (h) x frequency

27

Planck's constant

6.626 x 10^-34 joules-second

4.135 x 10^-15 electron volt-sec

28

1 joule

6.24 x 10^18 eV

29

1 ev

1.6 x 10^-19 J

30

1 erg

1 x10^7 J

31

1 erg (2)

6.24 x 10^11 eV