General Physics, 2nd Edition
2nd Edition
ISBN: 9780471522782
Author: Morton M. Sternheim
Publisher: WILEY
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Chapter 27, Problem 5E
To determine
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H-alpha line is a red visible spectral line in hydrogen atom with a wavelength of 656.3 nm. Consider five
distant stars labeled A, B, C, D, and E. The light from these starts was detected on Earth and, after
performing spectral analysis, the following H-alpha wavelengths were measured: AA = 667.5 nm,
Ag = 650.4 nm, Ac = 653.5 nm, Ap = 660.3 nm, and AE = 664.9 nm.
Which star has the slowest speed relative to Earth, in which direction and how fast does it move?
The slowest star is? and it moves Select an answer
The speed of the slowest star (in km/s), Vslowest =
Which star has the fastest speed relative to Earth, in which direction and how fast does it move?
The fastest star is? and it moves Select an answer Earth.
The speed of the fastest star (in km/s), Vfastest
Submit Question
=
Earth.
Units Select an answer ✓
Units Select an answer ✓
H-alpha line is a red visible spectral line in hydrogen atom with a wavelength of 656.3 nm. Consider five
distant stars labeled A, B, C, D, and E. The light from these starts was detected on Earth and, after
performing spectral analysis, the following H-alpha wavelengths were measured: A = 665.5 nm,
AB = 643.7 nm, Ac = 653.9 nm, Ap = 663 nm, and AE = 661.2 nm.
Which star has the slowest speed relative to Earth, in which direction and how fast does it move?
✓ Earth.
The slowest star is CV and it moves towards
The speed of the slowest star (in km/s), Vslowest
Which star has the fastest speed relative to Earth, in which direction and how fast does it move?
The fastest star is B ✓
and it moves towards
=
-1.095E12 X Units km/s
The speed of the fastest star (in km/s), Vfastest = -5.73E6
Earth.
x Units km/s
The energy of the n = 2 Bohr orbit is -30.6 eV for
an unidentified ionized atom in which only one
electron moves about the nucleus. What is the
radius of the n = 3 orbit for this species?
Number i
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Chapter 27 Solutions
General Physics, 2nd Edition
Ch. 27 - Prob. 1RQCh. 27 - Prob. 2RQCh. 27 - Prob. 3RQCh. 27 - Prob. 4RQCh. 27 - Prob. 5RQCh. 27 - Prob. 6RQCh. 27 - Prob. 7RQCh. 27 - Prob. 8RQCh. 27 - Prob. 9RQCh. 27 - Prob. 10RQ
Ch. 27 - Prob. 1ECh. 27 - Prob. 2ECh. 27 - Prob. 3ECh. 27 - Prob. 4ECh. 27 - Prob. 5ECh. 27 - Prob. 6ECh. 27 - Prob. 7ECh. 27 - Prob. 8ECh. 27 - Prob. 9ECh. 27 - Prob. 10ECh. 27 - Prob. 11ECh. 27 - Prob. 12ECh. 27 - Prob. 13ECh. 27 - Prob. 14ECh. 27 - Prob. 15ECh. 27 - Prob. 16ECh. 27 - Prob. 17ECh. 27 - Prob. 18ECh. 27 - Prob. 19ECh. 27 - Prob. 20ECh. 27 - Prob. 21ECh. 27 - Prob. 22ECh. 27 - Prob. 23ECh. 27 - Prob. 24ECh. 27 - Prob. 25ECh. 27 - Prob. 26ECh. 27 - Prob. 27ECh. 27 - Prob. 28ECh. 27 - Prob. 29ECh. 27 - Prob. 30ECh. 27 - Prob. 31ECh. 27 - Prob. 32ECh. 27 - Prob. 33ECh. 27 - Prob. 34ECh. 27 - Prob. 35ECh. 27 - Prob. 36ECh. 27 - Prob. 37ECh. 27 - Prob. 38ECh. 27 - Prob. 39ECh. 27 - Prob. 41ECh. 27 - Prob. 42ECh. 27 - Prob. 43ECh. 27 - Prob. 44ECh. 27 - Prob. 45ECh. 27 - Prob. 46ECh. 27 - Prob. 47ECh. 27 - Prob. 48E
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- A hypothetical atom has only two atomic energy levels, separated by 3.2 eV. Suppose that at a certain altitude in the atmosphere of a star there are 6.1 * 1013/cm3 of these atoms in the higher-energy state and 2.5 * 1015/cm3 in the lower-energy state. What is the temperature of the star’s atmosphere at that altitude?arrow_forwardif the energy levels for a hydrogenic atom are given by En=-13.6/n^2eV, the ionization energy of the U91+ ion in its ground state is: a) 13.6eV , b) 1,251.2eV, c) 1,237.6eV, d) 115,110.4eV, e) 112,621.6eVarrow_forwardA certain helium ion (Z = 2) contains a single excited electron in the n = 3 quantum state. When this excited electron decays back to its ground state, what is the energy of the emitted photon? Enter the numerical value in units of eV.arrow_forward
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