Absorbing radiation Flashcards
1
Q
What is something that all objects constantly do
A
- Absorb and emit electromagnetic radiation
2
Q
What happens to an object hotter than its surroundings
A
- Emits more radiation than it absorbs
- Temperature of the object decreases
3
Q
What happens to an object cooler than its surroundings
A
- Absorbs more radiation than it emits
- Temperature of the object increases
4
Q
How is the temperature of an object determined
A
- The balance between absorption and emition of radiation
5
Q
What happens to an object when it absorbs radiation
A
- The temperature will increase
- Radiation is pure energy so the object is gaining energy so temperature increases
6
Q
What is happening when an object remains a constant temperature
A
- It is absorbing and emitting the same amount of radiation
7
Q
What is the intensity
A
- The power of the radiation per unit of area
- The amount of energy that the radiation transfers to a given area in a certain amount of time
8
Q
What happens to the intensity as the temperature increases
A
- As temperature increases, the intensity of every emitted wavelength increases
- Shorter wavelengths increase more
9
Q
What radiation is emitted via hot objects
A
- UV
- Visible light
- Infrared
10
Q
How does the Earth maintain a constant temperature
A
- Emits the same amount of radiation at night via infrared as it absorbs during the day via UV
