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02-12-2017, 09:41 PM
Brian
Thank you for your politeness, I actively participated in astronomy for 10 years and should have known this. I also had a de'ja' vu moment because I think we covered this in our "radon" discussions.
When we are in the shadow of the sun i.e. night, we can see infrared radiation with thermal imaging as heat, but the source of heat we can see depends on the wavelength it is being emitted at eg a hot rock in the desert after sunset (black body) or a human being (continuous). Is this a fair assumption of the infrared spectrum, or do you need to be polite again ?
Duffy
Thank you for your politeness, I actively participated in astronomy for 10 years and should have known this. I also had a de'ja' vu moment because I think we covered this in our "radon" discussions.
When we are in the shadow of the sun i.e. night, we can see infrared radiation with thermal imaging as heat, but the source of heat we can see depends on the wavelength it is being emitted at eg a hot rock in the desert after sunset (black body) or a human being (continuous). Is this a fair assumption of the infrared spectrum, or do you need to be polite again ?
Duffy