Detectable wavelengths of light at the surface of the Earth

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SUMMARY

The discussion focuses on the detectable wavelengths of electromagnetic energy at the Earth's surface, specifically in the infrared spectrum. Approximately 50% of the light reaching the surface is infrared, despite expectations that longer wavelengths would be more absorbed by the atmosphere. Atmospheric moisture significantly absorbs infrared radiation, which is why infrared telescopes, such as those on Mauna Kea, are positioned at high altitudes to minimize this interference. Additional resources, including diagrams and detailed explanations of solar radiation levels, are provided for further understanding.

PREREQUISITES
  • Understanding of electromagnetic spectrum terminology
  • Familiarity with infrared radiation properties
  • Knowledge of atmospheric absorption effects
  • Basic concepts of telescope positioning and environmental factors
NEXT STEPS
  • Research the specific wavelengths of infrared light detectable on Earth
  • Explore atmospheric absorption characteristics of different wavelengths
  • Learn about the design and location considerations for infrared telescopes
  • Investigate solar radiation levels at various altitudes and their implications
USEFUL FOR

Researchers in atmospheric science, astronomers utilizing infrared telescopes, and environmental scientists studying solar radiation effects on Earth.

CRuff
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I am sure this will become a 'face-palm' moment, but can anyone point me in the direction of what electromagnetic energy wavelengths on either side of the visible spectrum, that is detectable on earth, ie what is not filtered by our atmosphere? I am specifically trying to find information on the wavelength spectrum of infrared light that hits the Earth's surface.
Thanks.
 
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CRuff said:
I am sure this will become a 'face-palm' moment, but can anyone point me in the direction of what electromagnetic energy wavelengths on either side of the visible spectrum, that is detectable on earth, ie what is not filtered by our atmosphere? I am specifically trying to find information on the wavelength spectrum of infrared light that hits the Earth's surface.
Thanks.
A quick Google will give you info on this. About 50% of light that reaches the Earth's surface is infra red according to searches. I'm surprised by that, I would have thought longer wavelengths would be more readily absorbed by the atmosphere.
 
CRuff said:
I am sure this will become a 'face-palm' moment, but can anyone point me in the direction of what electromagnetic energy wavelengths on either side of the visible spectrum, that is detectable on earth, ie what is not filtered by our atmosphere? I am specifically trying to find information on the wavelength spectrum of infrared light that hits the Earth's surface.
Thanks.
Nice diagram
https://www.fondriest.com/environme.../weather/photosynthetically-active-radiation/
 
pinball1970 said:
I'm surprised by that, I would have thought longer wavelengths would be more readily absorbed by the atmosphere.
A lot of IR is absorbed by atmospheric moisture. That is why IR telescopes are built on very high mountain tops to get above most of the atmospheric water vapour ... eg. the one on top of Mauna Kea

from my visit there in 1999
nasa_infrared_scope.jpg
 
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The image below, from this site, shows where the Earth's atmosphere is transparent enough for observations. This site has more detail on what component of the Earth's atmosphere is doing the absorption in the IR.

spect002.gif
 
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davenn said:
A lot of IR is absorbed by atmospheric moisture. That is why IR telescopes are built on very high mountain tops to get above most of the atmospheric water vapour ... eg. the one on top of Mauna Kea

from my visit there in 1999
View attachment 245756
My son visited the James Clerk Maxwell Telescope in Hawaii last year but did not get the data he needed as it was clouded over for 10 days pretty much. Go to Hawaii and get Manchester weather...

Anyway I should have noted the '1.what is solar radiation' in the link I posted to the original OP.
It explains all the levels at sea and atmospheric level including UV and infra red.
 
pinball1970 said:
y son visited the James Clerk Maxwell Telescope in Hawaii last year but did not get the data he needed as it was clouded over for 10 days pretty much. Go to Hawaii and get Manchester weather...
Was probably during the hurricane season LOL ... the summit was closed when I was there last year as well because of Hurricane Lane :frown:
 
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