Foundations of Astronomy (MindTap Course List)
14th Edition
ISBN: 9781337399920
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 7, Problem 8P
To determine
The wavelength of transition B produces the light.
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A hydrogen atom is in state N= 3, where N = 1 is the lowest energy state. What is K+U in electron volts for this atomic hydrogen energy state?
E3 =
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The hydrogen atom makes a transition to state N = 2. What is K+U in electron volts for this lower atomic hydrogen energy state?
E₂ =
eV
What is the energy in electron volts of the photon emitted in the transition from level N = 3 to N = 2?
Ephoton =
eV
1) An electron, m= 9.109 x 10-3¹ kg, is moving in a two dimensional box. The frequency of the n
=1 to n = 2 transition is 6 x 10¹2/sec.
A) What is the length of the box?
B) What wavelength of light is emitted if the electron transits from n = 4 to n=2?
CC
TL
A sodium atom makes a transition from the first excited state to the groundstate, emitting a 589.0-nm photon with energy 2.105 eV. If the lifetime of this excited state is 1.6 × 10−8 s , what is the uncertainty in energy of this excited state? What is the width of the corresponding spectral line?
Chapter 7 Solutions
Foundations of Astronomy (MindTap Course List)
Ch. 7 - Prob. 1RQCh. 7 - Prob. 2RQCh. 7 - Prob. 3RQCh. 7 - Prob. 4RQCh. 7 - Prob. 5RQCh. 7 - Prob. 6RQCh. 7 - Prob. 7RQCh. 7 - Prob. 8RQCh. 7 - Prob. 9RQCh. 7 - Prob. 10RQ
Ch. 7 - Prob. 11RQCh. 7 - Prob. 12RQCh. 7 - Prob. 13RQCh. 7 - Prob. 14RQCh. 7 - Prob. 15RQCh. 7 - Prob. 16RQCh. 7 - How is heat different from temperature?Ch. 7 - Prob. 18RQCh. 7 - Prob. 19RQCh. 7 - Prob. 20RQCh. 7 - Prob. 21RQCh. 7 - Prob. 22RQCh. 7 - Could an object be orbiting another object and we...Ch. 7 - Prob. 24RQCh. 7 - How Do We Know? How is the macroscopic world you...Ch. 7 - Prob. 1PCh. 7 - Answer these questions for celestial bodies at...Ch. 7 - Prob. 3PCh. 7 - Prob. 4PCh. 7 - Prob. 5PCh. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 10PCh. 7 - Prob. 11PCh. 7 - Prob. 12PCh. 7 - Prob. 1SOPCh. 7 - Prob. 2SOPCh. 7 - Prob. 1LTLCh. 7 - Prob. 2LTLCh. 7 - Prob. 3LTLCh. 7 - Prob. 4LTLCh. 7 - Prob. 5LTLCh. 7 - Prob. 6LTLCh. 7 - Prob. 7LTL
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- What is the momentum of a 589-nm yellow photon?arrow_forwardAn electron in a box is in the ground state with energy 2.0 eV. (a) Find the width of the box. (b) How much energy is needed to excite the electron to its first excited state? (c) If the electron makes a transition from an excited state to the ground state with the simultaneous emission of 30.0-eV photon, find the quantum number of the excited state?arrow_forward(a) What is the minimum value of 1 for a subshell that has 11 electrons in it? (b) If this subshell is in the n=5 shell, what is the spectroscopic notation for this atom?arrow_forward
- Helium was first discovered when astronomers viewed the spectrum from the Sun and could not associate absorption lines associated with any terrestrial element. One wavelength that was strongly absorbed was 587.5 nm (1 nm = 1.0×10-9 m). What is the energy associated with this wavelength of light? a. 1.06 eV (or 1.70×10-19 J) b. 0.943 eV (or 1.51×10-19 J) c. 2.11 eV (or 3.38×10-19 J) d. 0.472 eV (or 7.57×10-20 J)arrow_forwardThe two nuclei in the carbon monoxide (CO) molecules are 0.1128 nm apart. The mass of the carbon atom is 1.993x10-26 kg. The mass of the oxygen atom is 2.656x10-26 kg.What is the wavelength of the photon emitted in the transition from first excited state to the ground state? (Give your answer in mm.)arrow_forward1. An incoming light beam has frequency 9.7 x 1014 Hz. (Use h=6.626 x 10-34 J.s) a.) How much energy in Joules does it have? b.) If the photons of this light beam are absorbed by a free electron, how much kinetic energy and speed will the free electron have?arrow_forward
- A sodium atom in one of the states labeled “Lowest excited levels” in Fig. remains in that state, on average, for 1.6 * 10-8 s before it makes a transition to the ground state, emitting a photon with wavelength 589.0 nm and energy 2.105 eV. What is the uncertainty in energy of that excited state? What is the wavelength spread of the corresponding spectral line?arrow_forwarda. An electron is found to a wavelength of A = 0.65 nm. What is the velocity of the electron? m/s b. A photon has a wavelength of A = 0.65 nm. What is the energy of the photon? Joulesarrow_forwardSuppose a photon has a momentum of 5.4 × 10-29 kg⋅m/s. A. What is the wavelength of such a photon in micrometers? B. Find its energy in electron volts.arrow_forward
- Electron orbital transition A produces light with a wavelength of 420 nm. Transition B involves half the energy of transition A. What wavelength (in nm) is the light it produces?arrow_forward3. A. 279.7 kJ of energy are required to remove one mole of electrons from one mole of lithium atoms. What is the maximum wavelength of light that can remove one electron from one lithium atom? (h = 6.626 x 1034J•sec, c = 3.0 x 10* m/s) B. Assume that a hydrogen atom's electron has been excited to the n= 5 energy level. How many different wavelengths of light can be emitted as this excited electron loses energy? Include a diagram to support your answer.arrow_forwardb. An electron and a photon has the same wavelength of 0.21 nm. Calculate the momentum and energy (in eV) of the electron and the photon. (Given c =3.00x108 m s-1, h =6.63 x 1034 J s, me=9.11 x 10-31 kg, mp=1.67 x 1027 kg and e=1.60x1019 C)arrow_forward
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