- #1
fog37
- 1,548
- 107
Hello Forum,
If a black object, being black, is a very good absorber or sunlight and at the same time a great emitter, why wouldn't it be cool? The total emission would seem to be the mechanism to remain cool. Maybe it works this way: if 100J of sunlight are absorbed, only a small % would be re-emitted? But then it would not be a good emitter...
A white object rejects all energy at all wavelengths from the very beginning and remains cool.
thanks,
fog37
If a black object, being black, is a very good absorber or sunlight and at the same time a great emitter, why wouldn't it be cool? The total emission would seem to be the mechanism to remain cool. Maybe it works this way: if 100J of sunlight are absorbed, only a small % would be re-emitted? But then it would not be a good emitter...
A white object rejects all energy at all wavelengths from the very beginning and remains cool.
thanks,
fog37