Tagged Questions
20
votes
2answers
2k views
Why is the sky not purple?
I realise the question of why this sky is blue is considered reasonably often here, one way or another. You can take that knowledge as given. What I'm wondering is, given that the spectrum of ...
2
votes
3answers
451 views
Electromagnetic wave reflection vs. light reflection
Related: x-ray interaction with atmosphere
I know that electromagnetic waves of particular frequencies reflect from the ionosphere. And the light (which from one perspective is an electromagnetic ...
3
votes
2answers
321 views
x-ray interaction with atmosphere
Why x-ray are stopped by atmosphere while they are more energetic than UV or IR?
They certainly interact with atmosphere but I can't understand which phenomenon stop them.
0
votes
1answer
169 views
range of infrared light
I notice in the EMS chart that only half of the IR range will travel through the earth's atmosphere. So in the range of frequencies that penetrate the atmosphere what frequency travels farthest?
