How Do You See Spectral Lines in Near IR from the Sun?

  • Thread starter rp895
  • Start date
  • Tags
    Ir Lines
In summary, Near IR (near-infrared) is a region of the electromagnetic spectrum with wavelengths from 700 nm to 1400 nm, just beyond the visible spectrum. It is commonly used in scientific research for spectroscopy, imaging, and sensing purposes. Compared to other regions of the electromagnetic spectrum, Near IR is less affected by scattering and absorption and is non-ionizing, making it safer for living cells. Spectroscopy techniques can be used to see lines in Near IR, which correspond to the presence of specific compounds or elements. Practical applications of Near IR technology include food and agriculture, pharmaceuticals, and environmental monitoring. It is used to analyze food products, identify counterfeit drugs, and detect pollutants in the air and water.
  • #1
rp895
8
0
Hi,
Quick spectroscopy question: Say I am looking at the sun with a near IR /IR spectrometer? I know there is H2 and He in the sun, and I assume I will see their spectral lines? If true, how come I see that, and the signal is not drowned by the heat from the sun? (since it is so hot, using stefan-boltzman law, i can determine energy, etc etc)
Thanks
rp895
 
Astronomy news on Phys.org
  • #2
The lines you will see are absorption lines (dark) from the cooler matter near the surface. The background spectrum is continuous and bright.
 

FAQ: How Do You See Spectral Lines in Near IR from the Sun?

What is Near IR?

Near IR, or near-infrared, is a region of the electromagnetic spectrum that is just beyond the visible spectrum. It has wavelengths ranging from 700 nanometers (nm) to 1400 nm.

How is Near IR used in scientific research?

Near IR is used in a variety of scientific research, including spectroscopy, imaging, and sensing. It is particularly useful for studying the chemical composition of materials and for mapping the distribution of certain compounds.

What are the benefits of using Near IR over other regions of the electromagnetic spectrum?

Near IR has several advantages over other regions of the electromagnetic spectrum. It is less affected by scattering and absorption, making it easier to obtain accurate measurements. It is also non-ionizing, meaning it does not have enough energy to cause damage to living cells.

How do you see lines in Near IR?

Lines in Near IR can be seen using spectroscopy techniques. This involves passing a beam of Near IR light through a sample and measuring the absorption or emission of specific wavelengths. The resulting spectrum will show distinct peaks or dips, which correspond to the presence of certain compounds or elements.

What are some practical applications of Near IR technology?

Near IR technology has a wide range of practical applications, including food and agriculture, pharmaceuticals, and environmental monitoring. It is used to analyze the composition of food products, identify counterfeit drugs, and detect pollutants in the air and water.

Similar threads

I Composition of the Sun: How We Know via Spectral Absorption Lines
Replies
10
Views
2K
B Why / How do we feel heat from the sun
Replies
7
Views
3K
I Confusion about absorption spectra - cool gases absorb?
Replies
17
Views
6K
I How Big of an Object Orbiting Closer to the Sun Than Earth Could Be Overlooked?
Replies
17
Views
3K
I Sun shade on Earth ground, is it a straight line or a curved line?
Replies
3
Views
620
How to Determine Temperature Difference Between Two Stars Using Spectral Lines?
Replies
0
Views
607
Are there gaps between the rays coming from the sun?
Replies
22
Views
3K
How Did The CCCP See Past Venus' Clouds Prior to Landing?
Replies
5
Views
2K
Spectrum of Stars: Explaining the Spectral Lines of Stars
Replies
2
Views
3K
How does the loss of sea ice affect Earth's temperature?
2
Replies
42
Views
5K

Hot Threads

Recent Insights

Back
Top