Energy- Radiation

Question 1

What is the temperature of the atmosphere regulated by?

Answer 1

Incident radiation by the sun, and then spatial redistribution.

Question 2

What light is absorbed by the atmosphere?

Answer 2

Photons in the visible portion of EM spectrum.

Question 3

How much infrared energy does Earth emit proportional to solar radiation it recieves?

Answer 3

Same amount.

Question 4

What type of wave is infrared?

Answer 4

Long wave

Question 5

Why does Earth remit infrared energy?

Answer 5

Earth is cooler than the sun, has less energy.

Question 6

Spectrum

Answer 6

Intesnsity of light/radiation emitted by an object as a function of wavelength.

Question 7

Blackbody Radiation

Answer 7

This is an object/system, absorbing all radiation incident upon it, re-radient energy characteristic of this radiating system only(independet of the type of incident radiation)

Question 8

Wiens Displacement Law

Answer 8

States black-body radiation curve for different temperatures peak at different wavelengths that are inversely proportional to the tempertaure.

Question 9

Why does WDL peak occur?

Answer 9

Planck radiation law

Question 10

Plancks Law

Answer 10

Says that spectral density of ER emitted by a BB in thermal equilbrium at a given temperature, when no net flow of matter/energy between body and envrionment

Question 11

Spectral Density

Answer 11

Describes distribution of power into frequency components composing that signal.

Question 12

Simply what does placnks law mean?

Answer 12

ER from heated bodies is not continous, but as discrete units of quanta of energy, size determined by plancks constant.

Question 13

Simply what does Wiens Displacement Law describe

Answer 13

That spectrum from increasing temperatures shifts towards shorter wavelenghts.

Question 14

Wavelenght

Answer 14

Distance from crest of one wave to the next

Question 15

Frequency

Answer 15

Number of wave cycles passing a particular point in a given time.

Question 16

Velocity

Answer 16

The speed at which individual components of the wave propogate throuhg space.

Question 17

What equation describes energy of a phootn?

Answer 17

E = hF

Question 18

Denote E = HF

Answer 18

h is plancks constant whilst f is velocity of light.

Question 19

What does E = hf tell you about energy of wavelenghts?

Answer 19

Photons have higher energies at shorter wavelenghts, drastically changing atoms they interact with.

Question 20

What is the wavelength of x rays?

Answer 20

100 angrstom

Question 21

Wavelength of extreme ultraviolet radiation?

Answer 21

100 and 2,500 angrstrom

Question 22

Where is Extreme UV absorbed?

Answer 22

By Ozone

Question 23

What is the ionsphere formed by?

Answer 23

Extreme UV interaction with ozone.

Question 24

How does ionosphere form?

Answer 24

Light ejects electrons from their atoms, producing partially ionised region.

Question 25

What wavelength is UV?

Answer 25

1250 to 3000 angstrom

Question 26

What wavelength is visible poriton?

Answer 26

3000 and 7000

Question 27

What wavelenght is infrared?

Answer 27

Greater than 7000

Question 28

Why does infrared get trapped beneath the atmosphere?

Answer 28

Length of radiation absorbed by GHG

Question 29

What is radiative flux balanced by?

Answer 29

Equal magnitude of infrared emission and radiatve energy asborption

Question 30

What causes the greenhoiuse effect?

Answer 30

Infraed absorptive gases reflect infrared back to earths surface.

Question 31

Solar Constant

Answer 31

The rate of which energy reaches earths surface from sun