EMR Principles

Question 1

UV spectrum

Answer 1

.01 - .4 µm
Used mainly for geological survey

Question 2

Visible spectrum

Answer 2

.4 - .7 µm

Question 3

Blue band

Answer 3

.4 - .5 µm

Question 4

Green band

Answer 4

.5 - .6 µm

Question 5

Red band

Answer 5

.6 - .7 µm

Question 6

Infrared

Answer 6

.7 - 14 µm

Question 7

Near IR

Answer 7

.7 - 1.3 µm

Question 8

Mid/Shortwave IR

Answer 8

1.3 - 3 µm

Question 9

Thermal IR

Answer 9

3 - 14 µm

Question 10

Microwave

Answer 10

1mm - 1m Mainly for radar

Question 11

Wave Model Equation

Answer 11

C=Lambda x V
C = 3x10^8 speed of light
Lambda = Wavelength
V = Wave Frequency

Question 12

Wave Model implication

Answer 12

As frequency goes up, wavelength goes down

Question 13

Particle Model definition

Answer 13

Light travels in individual units, photons or quantas
Planck in 1900
Einstein in 1905

Question 14

Particle Modle equation

Answer 14

Q = hv or Q = (hc)/Lambda
Q is energy of a quanta in J
h is plancks constant
c is speed of light 3x10^8
Lambda is wavelength

Question 15

Particle Model implication

Answer 15

As wavelength goes down energy goes up
As frequency goes up energy goes up

Question 16

Stefan Boltzmann Law purpose

Answer 16

Finding the energy emitted from an objects surface based on temperature (above absolute zero)

Question 17

Stefan Boltzmann equation

Answer 17

M=sigma x T^4
M is energy radiated in W/m^2
Sigma is S-B’s law constant
T is temperature in Kelvin

Question 18

Stefan Boltzmann Law implication

Answer 18

As energy radiate increases so does temperature (sort of exponentially)

Question 19

Wien’s Displacement Law purpose (and blackbody)

Answer 19

Find (theoretical) peak wavelength based on blackbody
a blackbody is a theoretical object with no reflectance

Question 20

Wien’s Displacement Law equation

Answer 20

Labda peak = K/T
K is Wien’s constant
T is temperature

Question 21

Wien’s Displacement implication

Answer 21

As temperature or radiated energy increases wavelength decreases