Question

-Why do we not see helium absorption lines in stars like the Sun?

-Why do we not see helium absorption lines in stars like the Sun?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

when white light passes through a gas and then passed through a prism, some colours are missing as they are absorbed by the gas and this property is used in spectrometry to determine an unknown element .

for most elements, emission and absorption are the strongest at a certain temperature. Helium absorpiton lines occur only at very high temperature and this property is used for determining temperature of a star and stars are categorized on the basis of temperature.

O type stars with temperature between 28000 K -50000 K are the ones who show absorption lines of ionized helium.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Astronomers use diffraction gratings to study the spectra of light from stars. For stars like the...
Astronomers use diffraction gratings to study the spectra of light from stars. For stars like the Sun, Calcium produces a pair of spectral features called the H and K lines at wavelengths of 396.9 nm and 393.4 nm, respectively. One of the spectrographs on the Keck telescope contains a diffraction grating with 1200 lines/mm. What is the angular separation between the H and K lines in the second order produced by this spectrograph? Astronomers use diffraction gratings to study the...
The spectrum of a star has dark absorption lines of helium superimposed on a continuous spectrum....
The spectrum of a star has dark absorption lines of helium superimposed on a continuous spectrum. What can you conclude from this? a The star is made up of helium b There is a great deal of helium in the earth’s atmosphere c The dark lines have absorbed helium d The light from the star has passed through a cloud of helium Estimate the wavelength of the red line in oxygen. Which of the following regions is the widest? a....
1.What nuclear reaction is used in the Hydrogen Bomb? 2.How many spectral lines (wavelengths) do we...
1.What nuclear reaction is used in the Hydrogen Bomb? 2.How many spectral lines (wavelengths) do we see from the beam of a helium-neon laser? 3. How many spectral lines (wavelengths) do we see from a red LED?
Why do the planets go around the Sun? (e.g., why Earth orbits the Sun)? P.S. I...
Why do the planets go around the Sun? (e.g., why Earth orbits the Sun)? P.S. I would like that you understand the topic and the basic physics.
How do the altering factors like wavelength and frequency affect the way we see and hear?...
How do the altering factors like wavelength and frequency affect the way we see and hear? How do lenses and walls alter the way we see certain lights and hear certain sounds?
Why do we think that Neptune must have formed closer to the Sun, and later migrated...
Why do we think that Neptune must have formed closer to the Sun, and later migrated outward to its present position?
The stars, gas and dust in a galaxy rotate about the center of the galaxy. We...
The stars, gas and dust in a galaxy rotate about the center of the galaxy. We would like to know exactly how to describe the rotation of all parts of the galaxy. In other words, we want to know if galaxies rotate like merry-go-rounds, or like planets orbit the Sun, or in some other way. 1. Do points near the center of a merry-go-round complete a full rotation in the same amount of time as points near the outer edge...
Why hydrogen spectrum shows four lines in the visible region, helium shows eight, sodium shows two...
Why hydrogen spectrum shows four lines in the visible region, helium shows eight, sodium shows two and neon shows sixteen?
What damage do we see in the aveoli of a COVID 19 patient and why ?...
What damage do we see in the aveoli of a COVID 19 patient and why ? Why is the process of inflamation so dangerous to the COVID 19 Patient ?
Stellar nurseries are massive regions of star formation much like the region in which our own...
Stellar nurseries are massive regions of star formation much like the region in which our own star formed. Once these baby stars form they eventually get gravitationally ejected from the region and move into interstellar space. Stars are formed in bundles in this regard and our Sun likely has numerous brothers and sisters that formed from the same cloud as ours. They are out there independently revolving around the center of the Milky Way as we are. Our Sun's sister...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT