A star has an emission line at a wavelength of 666.80 nm. The rest wavelength of the...
A star has an emission line at a wavelength of 666.80 nm. The rest wavelength of the line is 656.3 nm. What is the velocity of the star?
Hint: How does the velocity of a star depend on its observed
wavelength? What is the equation for Doppler shift?
The speed of light is 3.0 × 105 km/s.
Homework Answers
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A star has an emission line at a wavelength of
666.80 nm. The rest wavelength of the...
You obtain spectra for two galaxies and measure the observed wavelength of a hydrogen emission line...
You obtain spectra for two galaxies and measure the observed wavelength of a hydrogen emission line that has a rest wavelength of 656.3 nm. Here are your results: Galaxy 1: Observed wavelength of hydrogen line is 672.9 nm Galaxy 2: Observed wavelength of hydrogen line is 692.6 nm (a) Calculate the redshift, z, for each of the two galaxies. (b) What is each one’s recessional velocity (in km/s)? (c) Which of these galaxies is farther away from you? (d) How...
A red emission lone from a star has a wavelength of 650 nm. A) What is...
A red emission lone from a star has a wavelength of
650 nm.
A) What is the corresponding frequency?
B How much energy does each photon at this wavelength
carry?
Back HW 2.pdf SCIE 223: Astronomy Written Homework 2 due Thursday, November 21, 2019 A red emission line from a star has a wavelength of 650 nm. 1) What is the corresponding frequency? Show your work a. b. How much energy does each photon at this wavelength carry? Show your...
Suppose that you observe a spectral line in a star at a wavelength of 600.06 nm....
Suppose that you observe a spectral line in a star at a wavelength of 600.06 nm. Knowing that the same spectral line has a laboratory wavelength of 600.00 nm, what is the velocity of the star along the line of sight (in km/s)
DopplerShift:TheHb(hydrogenbeta)line,whichisstronginthespectraof moderately hot stars, has a wavelength of 486.133 nm in the laboratory (i.e., at rest...
DopplerShift:TheHb(hydrogenbeta)line,whichisstronginthespectraof moderately hot stars, has a wavelength of 486.133 nm in the laboratory (i.e., at rest with respect to the observer). What wavelength (nm) would we observe the Hb line on Earth if it were emitted by a star: a) moving at a speed of 200 km/s toward Earth? b) moving at a speed of 300 km/s away from Earth?
1. Doppler shifts have been used to determine the rate of expansion of the universe. a) Given that a distant star is receding at a speed approximately 8% of the speed of light, determine the shif...
1. Doppler shifts have been used to determine the rate of expansion of the universe. a) Given that a distant star is receding at a speed approximately 8% of the speed of light, determine the shift in the observed wavelength for a particular spectral line of 3 ps* that normally has a wavelength of 326 nm b) The FWHM of the spectral line mentioned in the previous problem is 53.8 pm. What is the surface temperature of the star?
1....
An intense emission line for a new element is observed at a wavelength of 700 nm....
An intense emission line for a new element is observed at a wavelength of 700 nm. what is the energy of a single photon of this light?
4. An intense emission line for a new element is observed at a wavelength of 325...
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The H α transition in hydrogen has a rest wavelength of 656.3 nm, coming from electrons...
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Astronomy Ranking Task: Doppler Shift Exercise #4 Description: An important line in the absorption spectrum...
Astronomy Ranking Task: Doppler Shift Exercise #4 Description: An important line in the absorption spectrum of stars occurs at a wavelength of 656nm for stars at rest. Imagine that you study five stars (A-E) from Earth and discover that this absorption line is observed at the wavelength shown in the table below for each of the five stars. STAR Observed Wavelength of Absorption line A 650 nm B 663 nm C 656 nm D 657 nm E 646 nm...
2 &3 all please 2. The first line of the Balmer series occurs at a wavelength of 656.3 nm. What is the energy...
2
&3 all please
2. The first line of the Balmer series occurs at a wavelength of 656.3 nm. What is the energy difference between the two energy levels involved in the emission that results in this spectral line? 3. An advertising sign gives off red light and green light. a. Which light has the higher energy photons? b. One of the colors has a wavelength of 680 nm and the other has a wavelength of 500 nm. Which color...
A red emission lone from a star has a wavelength of
650 nm.
A) What is the corresponding frequency?
B How much energy does each photon at this wavelength
carry?
Back HW 2.pdf SCIE 223: Astronomy Written Homework 2 due Thursday, November 21, 2019 A red emission line from a star has a wavelength of 650 nm. 1) What is the corresponding frequency? Show your work a. b. How much energy does each photon at this wavelength carry? Show your...
1. Doppler shifts have been used to determine the rate of expansion of the universe. a) Given that a distant star is receding at a speed approximately 8% of the speed of light, determine the shift in the observed wavelength for a particular spectral line of 3 ps* that normally has a wavelength of 326 nm b) The FWHM of the spectral line mentioned in the previous problem is 53.8 pm. What is the surface temperature of the star?
1....
4. An intense emission line for a new element is observed at a wavelength of 325 nm. What is the frequency of this ight? Frequency Tries 0/2 Submit Answer 5. An intense emission line for a new element is observed at a wavelength of 700 nm. What is the energy of a single photon of this light Energy Tries 0/2 Submit Ans 6. For the line spectra experiment you analyzed the Baimer series to determine n and nu in the...
2
&3 all please
2. The first line of the Balmer series occurs at a wavelength of 656.3 nm. What is the energy difference between the two energy levels involved in the emission that results in this spectral line? 3. An advertising sign gives off red light and green light. a. Which light has the higher energy photons? b. One of the colors has a wavelength of 680 nm and the other has a wavelength of 500 nm. Which color...
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