1. Hydrogen has an emission line at 656nm. We study a galaxy and measure a wavelength...
1. Hydrogen has an emission line at 656nm. We study a galaxy and measure a wavelength for the Hydrogen line of 734nm. What is the redshift (round to 3 decimal places)?
2. The Milky Way lies in the center of the universe. True or false?
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1. Hydrogen has an emission line at 656nm. We study a galaxy and
measure a wavelength...
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...
1.(3) The line of longest wavelength in visible light for the emission spectrum of hydrogen, 656nm...
1.(3) The line of longest wavelength in visible light for the emission spectrum of hydrogen, 656nm (Balmer series), would correspond to what electronic transition? 2.(7) Explain the wave-particle duality of matter and light. Why don’t we notice this effect in everyday activities? What do electrons behave most like in an atom? 3.(8) What is the approximate range, in nm, for visible light? Which end contains photons of the highest energy? What is the mathematical relationship between energy of a photon...
The rich galaxy cluster Abell 1689 has a redshift z = 0.1832. It contains a large...
The rich galaxy cluster Abell 1689 has a redshift z = 0.1832. It contains a large amount of hot gas at a temperature T ≃ 108 K. We observe an emission line due to the n = 2 → 1 transition of Fe XXVI (that is, iron which has lost all but one of its Z = 26 electrons). For a hydrogen-like ion with nuclear charge Z, the energy levels of hydrogen are all multiplied by a factor of Z2....
1.(3) The line of longest wavelength in visible light for the emission spectrum of hydrogen, 650nm (Balmer series),...
1.(3) The line of longest wavelength in visible light for the emission spectrum of hydrogen, 650nm (Balmer series), would correspond to what electronic transition? 2.(7) Explain the wave-particle duality of matter and light. Why don't we notice this effect in everyday activities? What do electrons behave most like in an atom?
Suppose that you have obtained spectra of several galaxies and have measured the observed wavelength of the H-alpha line (rest wavelength = 656.3nm) to be: Galaxy 1: 659.4 nm. Galaxy 2: 664.1 nm. Gala...
Suppose that you have obtained spectra of several galaxies and have measured the observed wavelength of the H-alpha line (rest wavelength = 656.3nm) to be: Galaxy 1: 659.4 nm. Galaxy 2: 664.1 nm. Galaxy 3: 675.7 nm. 10. [4pt] Calculate the redshift, z, for each of these galaxies. 11. [4pt] Calculate the radial velocity of each of these galaxies. 12. [4pt] Assuming a Hubble Constant of 66.4 km/s/Mpc, calculate the distance to each of these galaxies (answer in Mpc).
Now we are going to investigate habitability zones on the scale of the c Milky Way Galaxy. The tw...
Now we are going to investigate habitability zones on the scale of the c Milky Way Galaxy. The two competing factors that we will look at are 1) the likelihood of planets forming (since we assume that life needs a planct to evolve on), and 2) the likelihood of life being wiped out by a cosmic catastrophe Open up the Milky Way Habitabilty Explorer. Each of the two factors described above are illustrated in a graph as a function of...
What is the wavelength, in nanometers of the bright line of the hydrogen emission spectrum corresponding...
What is the wavelength, in nanometers of the bright line of the hydrogen emission spectrum corresponding to the following transition? 1st attempt IN See Periodic Table O See Hint n-5 to n-3 nm
What is the wavelength, in nanometers, of the bright line of the hydrogen emission spectrum corresponding...
What is the wavelength, in nanometers, of the bright line of the hydrogen emission spectrum corresponding to the following transition? 2nd attempt Feedback See Periodic Table D See Hint n=5 to n=3 ® -717.47 nm
The hydrogen Balmer line hx has a wavelength of 486.1 nm. It is shifted 4.86 nm...
The hydrogen Balmer line hx has a wavelength of 486.1 nm. It is shifted 4.86 nm in a quasar's spectrum. What is the redshift z of this quasar? 0.001 0.01 4.86 486.1
3. The observed recession velocity of a galaxy is the sum of its Hubble flow velocity,...
3. The observed recession velocity of a galaxy is the sum of its Hubble flow velocity, UH = Hod, and the line-of-sight (LOS) component of its peculiar velocity, vp, due to local gravitational effects. a) Suppose we measure Ho by measuring the distance and redshift for a single galaxy velocity of the galaxy?10 b) At what distance can we measure Ho to 5%? Assume the true value of Ho is 74 kin s-"Mpc-1 and a typical LOS peculiar velocity is...
1.(3) The line of longest wavelength in visible light for the emission spectrum of hydrogen, 650nm (Balmer series), would correspond to what electronic transition? 2.(7) Explain the wave-particle duality of matter and light. Why don't we notice this effect in everyday activities? What do electrons behave most like in an atom?
Now we are going to investigate habitability zones on the scale of the c Milky Way Galaxy. The two competing factors that we will look at are 1) the likelihood of planets forming (since we assume that life needs a planct to evolve on), and 2) the likelihood of life being wiped out by a cosmic catastrophe Open up the Milky Way Habitabilty Explorer. Each of the two factors described above are illustrated in a graph as a function of...
What is the wavelength, in nanometers of the bright line of the hydrogen emission spectrum corresponding to the following transition? 1st attempt IN See Periodic Table O See Hint n-5 to n-3 nm
What is the wavelength, in nanometers, of the bright line of the hydrogen emission spectrum corresponding to the following transition? 2nd attempt Feedback See Periodic Table D See Hint n=5 to n=3 ® -717.47 nm
3. The observed recession velocity of a galaxy is the sum of its Hubble flow velocity, UH = Hod, and the line-of-sight (LOS) component of its peculiar velocity, vp, due to local gravitational effects. a) Suppose we measure Ho by measuring the distance and redshift for a single galaxy velocity of the galaxy?10 b) At what distance can we measure Ho to 5%? Assume the true value of Ho is 74 kin s-"Mpc-1 and a typical LOS peculiar velocity is...
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