|(d) How many nanometers would be the wavelength of a photon that would have the minimum amount of energy needed to ionize any hydrogen atom? (Hint: Electromagnetic radiation with this wavelength or shorter is called extreme ultraviolet radiation. (e) How many electron-volts (eV) would the electron in part (7)(d) need to have?

|(d) How many nanometers would be the wavelength of a photon that would have the minimum amount of energy needed to ionize any hydrogen atom? (Hint: Electromagnetic radiation with this wavelength or shorter is called extreme ultraviolet radiation. (e) How many electron-volts (eV) would the electron in part (7)(d) need to have?

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter28: Atomic Physics

Section: Chapter Questions

Problem 23P

See similar textbooks

Similar questions

(d) volume (e) Show that the total number of photons per unit at temperature Tis kT N' = 8π hc. where x = = E/KT. Taking the value of the integral in (c) to be about 2.404, determine how many photons per cubic centimeter are there in a cavity filled with radiation at T = 300 K. (f) radiation is emitted. 3 ∞ 0 x² 1 ex. - 1 dx Find the energy at which the maximum
F(V)dV = dN N MV². -)dv 2RT M -3/2v² exp(- 2 TRT' = 4T(- Find the Vm value by considering the following curve 25 x 10- 20 x 10-4 298 K 15 x 10-4 10 x 10-4t 1500 K 5 x 10-+ Vm Vm u, m s-1 0osz 0007 0OSI np N NP
What are the (a) energy, (b) magnitude of the momentum, and (c) wavelength of the photon emitted when a hydrogen atom undergoes a transition from a state with n = 4 to a state with n = 2? (a) Number 2.55 Units eV (b) Number 1.3617 Units kg-m/s or N-s (c) Number 4.865976353 Units This answer has no units
3. Starting from a thermal energy of phonon in the integral form 3π nD U = - ³7 for ( - II) n² dn hwn [exp(ħwn/t) − 1]) 2 where Debye number n = (6N/π)¹/³, find out the high temperature limit of the thermal energy (= 3NT) and heat capacity (= 3N) of phonon. I
(b) Derive Rutherford scattering formula of alpha radiations from a gold foil on the basis of nuclear model of atom. Why did planetary model of atom fail? (c) What are the short comes in Rayleigh formula for the explanation of energy distribution in blackbody radiations? Derive Planck's radiation formula from Rayleigh formula and express it in terms of wavelength. Q#3 (a) Work function of the Aluminum is 4.08 eV. I. What is the threshold frequency required to produce photoelectrons from aluminum? II. Classify electromagnetic radiations that can produce photoelectrons. III. If light of frequency 4 x 1015 Hz is used to illuminate a piece of aluminum, then what is the maximum energy and speed of emitted photoelectrons? IV. If the light described in part (ii) is increased by a factor of 2 in intensity, what would happen to the maximum kinetic energy of photoelectrons? f200 V What is the de
5. (a) By considering the case where an atom is enclosed within a cavity containing black body radiation at temperature T, show that the Einstein A and B coefficients are related to each other through the following relationships: 9,B12 = 92B21, 8nhv³ - B21, A21 where g, and g, are the degeneracies of the two levels respectively. The spectral energy density of black body radiation is given by 8thv³ u(v) c exp(hv/kgT) –1 1 where kg is Boltzmann's constant. (b) Explain why the effective temperature of the laser levels must be negative in order for a laser to oscillate. (c) The degeneracies of the upper and lower levels of the 488.0 nm line of the argon ion laser are 6 and 4, respectively. Deduce the effective temperature of the laser levels when the population of the upper level is twice that of the lower level. (d) Describe how population inversion is achieved in a semiconductor laser diode. (e) A certain semiconductor laser diode has a length of 0.5 mm and has a high reflection coating…
hd Px 5. Evaluate the following commutators: (Remember that i dx ). (a) [x.y] (b) [x.px] (c) [ps.py] (d) [x².px] (e) [(1/x).px] (f) [(1/x).p²] (g) [xpy-ypx.yp-zpy
A hydrogen atom is in its ground state (n, = 1) when a photon impinges upon it. The atom absorbs the photon, which has precisely the energy required to raise the atom to the n, = 3 state. (a) What was the photon's energy (in eV)? 12.089 ev (b) Later, the atom returns to the ground state, emitting one or more photons in the process. Which of the following energies describes photons that might be emitted thus? (Select all that apply.) O 13.6 ev O 1.89 eV V 12.1 eV O 10.2 ev There are two ways a hydrogen atom in the n, = 3 state can end up in the ground state. In the first, all of the energy goes into one photon and the electron moves directly into the ground state. (What would be the energy of that photon?) In the other, the electron "descends" in two stages, each accompanied by the emission of a photon. (What would be the energies of those two photons?)
Problem-1: An asteroid is hurtling toward earth at 150,000“. The temperature of the asteroid is about 100 K, meaning that its peak emission is 2 = 29 µm. The speed of light is c = 3E[8]. a) What is the wavelength of light that we receive from the asteroid? (Answer: 2.89855E[-05] m)
(a) The lifetime of a highly unstable nucleus is 10-12 s. What is the smallest uncertainty (in ev) in its decay energy? ev (b) What is the ratio of this energy, AE, to the rest energy of an electron, Erest? ΔΕ Erest
7.123 One way to estimate the effective charge (Zeff) ofa many-electron atom is to use the equation IE1 =(1312 kJ/mol) (Z2eff/n2), where IE1 is the first ionizationenergy and n is the principal quantum number of theshell in which the electron resides. Use this equation tocalculate the effective nuclear charges of Li, Na, and K.Also calculate Zeff/n for each metal. Comment on yourresults.
Figure 1 of 1 > Energy (J) 4. 3. 2- 1- 1,2-1 +. -1 -21 K, + U, +Wt= K, + U, + AE %3D ext |||