Chapter 3

Question 1

How does temperature affect wavelength?

Answer 1

As every object above 0 Kelvin emits thermal radiation as a result of the kinetic energy of its atoms.

This radiation occurs across the whole electromagnetic spectrum but its most INTENSE at a particular wavelenght which is the PEAK WAVELENGTH

Question 2

What is a blackbody?

Answer 2

An object that:
1. Absorbs all incoming radiation
2. Does not reflect or transmit any radiation
3. Emits the max amount of thermal radiation possible

Question 3

The thermal energy that is emitted by an object as radiation is proportional to…?

Answer 3

The area under the intensity wavelength graph for that objects temperature.

Question 4

What happens when the temperature of an object increases?

Answer 4

The total energy across the spectrum radiated per second by the object is increased
the proportion of radiation that is short wavelength increases

Question 5

Do hotter objects emit more or less energy than cooler objects?

Answer 5

Hotter objects (shorter wavelengths) emit a greater proportion of radiation than cooler objects (longer wavelengths)

Question 6

Difference between weather and climate?

Answer 6

Weather refers to the local atmospheric conditions (wind, rain) that occur over a SHORT period of time (min, hrs, days)

Whereas climate refers to a regions or global average of atmospheric conditions such as humidity, over a LONG period of time

Question 7

What is albedo

Answer 7

How much electromagnetic radiation an object REFLECTS VS how much it ABSORBS