Question

A spectral line from a star is observed to have a wavelength of 656.5 nm. The...

  1. A spectral line from a star is observed to have a wavelength of 656.5 nm. The rest wavelength of this line is 656.8 nm. (a) What is the speed of the star, and (b) is it approaching or receding from the Earth? (c) If the star’s emitted wavelength is the same as the rest value, what is happening?
Science   Advanced-Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

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
9/ The star Betelgeuse has a wavelength of maximum emission of 923.5 nm, whereas the star...
9/ The star Betelgeuse has a wavelength of maximum emission of 923.5 nm, whereas the star Bellatrix has a wavelength of maximum emission of 131.8 nm. Which star is colder A/ more info B/ Bellatrix C/ Betelgeuse D/ same temperature 10/ Which of the following correctly lists the spectral sequence of stars in order of decreasing surface temperature? A/ O,B,A,F,G,K,M B/ M,K,G,F,A,B,O C/ O,M,K,G,F,B,A D/ A,B,F,G,K,M,O 11/ How is a star assigned its spectral type? A/ The star’s spectrum is...
A distant galaxy emits light that has a wavelength of 620 nm. On Earth, the wavelength...
A distant galaxy emits light that has a wavelength of 620 nm. On Earth, the wavelength of this light is measured to be 623 nm. a. Is this galaxy approaching or receding from the earth? b. Find the speed of the galaxy relative to earth. c. If this galaxy also emits another EM wave whose wavelength is 1025nm, what wavelength would we expect to measure on Earth for this wave?
A grating is 3.4 cm wide. A spectral line of wavelength 578 nm is observed at...
A grating is 3.4 cm wide. A spectral line of wavelength 578 nm is observed at 39∘ in order 3. The grating is made up of ---- lines. (How many?)
In the laboratory, an atom emits a spectral line at a wavelength of 400 nanometers. In...
In the laboratory, an atom emits a spectral line at a wavelength of 400 nanometers. In the spectrum of a star, the same spectral line is found to have a wavelength of 410 nanometers. What can be said about the star?
A certain spectral line in the spectrum of a double star ordinarily has a frequency of...
A certain spectral line in the spectrum of a double star ordinarily has a frequency of 0.5 x 10^15 Hz. If the star is approaching the earth at 200km/sec, by what fraction (delta f/f) will the frequency be changed?
Stars and galaxies in the distance universe are receding from us with a speed proportional to...
Stars and galaxies in the distance universe are receding from us with a speed proportional to their distance away, v = Hr, where H ≈ 73 m/s/Mpc is the Hubble constant. (a) What is the value of H in SI units? SR units? (Mpc = Mega parsec.) (b) Because they are receding from us, light received from distant stars will be red-shifted. It is common to define the dimensionless red-shift parameter z as λ/λ0 ≡ 1 + z. There is...
Suppose a star with radius 8.50 × 108 m has a peak wavelength of 685 nm...
Suppose a star with radius 8.50 × 108 m has a peak wavelength of 685 nm in the spectrum of its emitted radiation. Assume the star is a perfect blackbody. (A) What is the energy of a photon with this wavelength? (B) What is the surface temperature of the star? (C) At what rate is energy emitted from the star in the form of radiation?
1) The last two visible line observed in the Balmer series are of the wavelength 434.0...
1) The last two visible line observed in the Balmer series are of the wavelength 434.0 nm and 410.2 nm. For each of the wavelength, a) Determine the frequency associated with the photon associated with this wavelength. b) Determine the amount of energy released by this photon. c) The Balmer series are the results of excited electron at higher level relaxing to the electronic level of principle quantum number of nf = 2. Determine the excited electronic level, ni, of...
Astronomers determine that a particular star in our galaxy is moving toward Earth at a speed...
Astronomers determine that a particular star in our galaxy is moving toward Earth at a speed of 723.0 km/s with respect to the Earth. If Earth receives a wavelength λ = 686.1 nm from this star, what was the wavelength emitted by the star?
How do I solve these? Please show the steps Thank you 1)A certain star is moving...
How do I solve these? Please show the steps Thank you 1)A certain star is moving towards the earth at a velocity of 262 km/s. What can we expect to measure for a spectral line, normally found at 815.1 nm? 2)Star B is 41 Mega light years away from us. How fast is Star B receding from Earth in km/s? 3)We measure the velocity of Star A to be 404.5 km/s. How far away is Star A in Mega parsecs?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT