Absorbing radiation (Infrared & Black Body) Flashcards
How do absorbing and emitting radiation affect an object’s temperature?
The balance between absorbing and emitting radiation.
If an object is warmer than its surroundings and therefore emitting more than it is absorbing, what will happen?
It will lose energy and cool down
If an object is cooler than its surroundings and therefore absorbing more than it is emitting, what will happen?
It will gain energy and warm up
If an object emits and absorbs the same amount of energy, what will happen?
It will stay at the same temperature
What is intensity in terms of radiation
The power of the radiation per unit area
As ______ increases, the ________ of every emitted wavelength increases, but the _____ of the _______ wavelengths increases ______
temperature, intensity, intensity, shorter, more
The earth’s local temperature is cooler when?
It is night time, this is because more energy is being emitted rather than absorbed
The earth’s local temperature is higher when?
It is day time. this is because more energy is being absorbed rather than emitted
Why does the earth’s overall temperature stay constant?
As some part of the earth is always in the sun
An object at room temperature emits mostly….
Infrared radiation
