Concept explainers
Effective Magnetic Field. An electron in a hydrogen atom is in the 2p state. In a simple model of the atom, assume that the electron circles the proton in an orbit with radius r equal to the
Want to see the full answer?
Check out a sample textbook solutionChapter 41 Solutions
University Physics with Modern Physics (14th Edition)
Additional Science Textbook Solutions
Physics: Principles with Applications
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Life in the Universe (4th Edition)
College Physics
The Cosmic Perspective (8th Edition)
Conceptual Integrated Science
- An electron in an excited energy state of the Hydrogen atom has an energy En = 0.85 eV which is 12.75 eV above the ground state. What is the radius rn of the electron’s orbit? Select one: a. 2.12 angstroms b. 8.47 angstroms c. 13.23 angstroms d. 4.77 angstromsarrow_forwardWhich of these expressions would yield the wavelength of light in meters emitted when an electron drops from orbit n=3 n=2 in a Bohr hydrogen atom? Given h=4.14 x 10^15 eVs and c=3.00 x 10^8 m/s. A. 1.89 x h x c B. hc/1.89 C. 1.89/hxc D. (1.51+ 3.4)/hc E. hc/3.4arrow_forwardA “soft x-ray” photon with an energy of 41.8 eV is absorbed by a hydrogen atom in its ground state, knocking the atom’s electron out. What is the speed of the electron as it leaves the atom?A. 1.84 * 105 m/sB. 3.08 * 105 m/sC. 8.16 * 105 m/sD. 3.15 * 106 m/sE. 3.83 * 106 m/sarrow_forward
- An electron in a hydrogen atom makes a transition from the n=1 state to the n=3 state (1eV= 1.6 x10^-19 J and h = 6.63 x 10^-34 J s= 4.136 x 10^-15 Ev/hz c =3.0 x10^8 m/s) what is the energy of the photon absorbed in transition and what is the frequency of the absorbed photon energy?arrow_forwardIn the Bohr model, which of the following properties of the eletron come in discrete (not continuous) values?I. orbital radiusII. angular momentumIII. total energyIV. potential energy a I, II, and III only b I and III only c All four d I and II onlyarrow_forwardWhy is the following situation impossible? An experiment is performed on an atom. Measurements of the atom when it is in a particular excited state show five possible values of the z component of orbital angular momentum, ranging between 3.16 x 10-34 kg ⋅ m2/s and -3.16 x 10-34 kg ⋅ m2/s.arrow_forward
- The light observed that is emitted by a hydrogen atom is explained by a simple model of its structure with one proton in its nucleus and an electron bound to it, but only with internal energies of the atom satisfying EH=−RH/n2EH=−RH/n2 where RHRH is the Rydberg constant and nn is an integer such as 1, 2, 3 ... and so on. When a hydrogen atom in an excited state emits light, the photon carries away energy and the atom goes into a lower energy state. Be careful about units. The Rydberg constant in eV is 13.605693009 eV That would be multiplied by the charge on the electron 1.602× 10-19 C to give 2.18× 10-18 J A photon with this energy would have a frequency f such that E=hf. Its wavelength would be λ = c/f = hc/E. Sometimes it is handy to measure the Rydberg constant in units of 1/length for this reason. You may see it given as 109737 cm-1 if you search the web, so be aware that's not joules. The following questions are intended to help you understand the connection between…arrow_forwardThe mean free path length of a 0.7-MeV photon in lead is closest to which of the following? (a)0.1039 cm (b)0.6697 cm (c)0.7038 cm (d)1.1394 cm (e)0.8776 cmarrow_forwardA mystery particle enters the region between the plates of a Thomson apparatus as shown in Figure 4.6. The deflection angle θ is measured to be 0.20 radians (downwards) for this particle when V = 2000 V, ℓ = 10.0 cm, and d = 2.00 cm. If a perpendicular magnetic field of magnitude 4.57 × 10−2 T is applied simultaneously with the electric field, the particle passes through the plates without deflection. (a) Find q/m for this particle. (b) Identify the particle. (c) Find the horizontal speed with which the particle entered the plates. (d) Must we use relativistic mechanics for this particle?arrow_forward
- What is the magnitude of the spin momentum of an electron? (Express you answer in terms of h.)arrow_forwardThe force on a magnetic moment z in a nonuniform magnetic field Bz is given by Fz=zdBzdz If a beam of silver atoms travels a horizontal distance of 1 m through such a field and each atom has a speed of 100 m/s, how strong must the field gradient dBz/dz be in order to deflect the beam 1 mm?arrow_forwardA hydrogen atom is placed in a magnetic field. Which of the following quantities are affected? (a) total energy; (h) angular momentum; (c) z-component of angular momentum; (d) polar angle.arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningModern PhysicsPhysicsISBN:9781111794378Author:Raymond A. Serway, Clement J. Moses, Curt A. MoyerPublisher:Cengage LearningUniversity Physics Volume 3PhysicsISBN:9781938168185Author:William Moebs, Jeff SannyPublisher:OpenStax