Thermal remote sensing

Question 1

What are the three mechanisms for energy transfer?

Answer 1

Conduction
Convection
Electromagnetic radiation

Question 2

How does conduction work?

Answer 2

Conduction occurs when one body (molecule or atom) transfers its kinetic energy to another by colliding with it. Like heating water in a pan.

Question 3

How does convection work?

Answer 3

The kinetic energy of bodies is transferred from one place to another by physically moving the bodies. An example is the convectional heating of air in the atmosphere in the early afternoon.

Question 4

Which radiation is the longest? Thermal infrared, Visible or SWIR

Answer 4

Thermal infrared

Question 5

What are the three key laws which describe the thermal properties of objects?

Answer 5

Planck’s Law
Stefan-Boltzman Law
Weins displacement Law

Question 6

What does plancks law describe?

Answer 6

The distribution of energy with wavelength as a function of temperature

Question 7

What does Stefan-Boltzman law describe?

Answer 7

The relationship between the total energy emitted and temperature

Question 8

What does the Weins displacement law describe?

Answer 8

The spectral distribution of energy as a function of temperature

Question 9

According to Plancks law- how does the graph appear at short wavelengths?

Answer 9

Steep rise

Question 10

According to Plancks law- how does the graph appear at long wavelengths?

Answer 10

Long tail