An Introduction to Thermal Physics
1st Edition
ISBN: 9780201380279
Author: Daniel V. Schroeder
Publisher: Addison Wesley
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter A.1, Problem 1P
(a)
To determine
To Show: The value of
(b)
To determine
To Calculate:The energy of photon with each of different wavelengths.
(c)
To determine
To Calculate: The number of photons emitted in one second.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
To a good approximation, the sun’s surface is a blackbody with a surfacetemperature of 5300 K. (a) At what wavelengthdoes the sun emit most strongly? (b) What is the total radiated powerper unit surface area?
Part a) Find the total energy (in J) of
2.158 x 10^19 photons of red light (λ=675 nm)?
Part b) Find the work function (in kJ/mol) for a metal if its threshold frequency is 8.785 x 10^14
Hz?
A blackbody’s temperature is increased from 900 K to 2300 K. By what factor does the total power radiated per unit area increase? (a) If the original temperature is again 900 K, what fi nal temperature is required to double the power output?
Chapter A Solutions
An Introduction to Thermal Physics
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A student in a physics laboratory observes a hydrogen spectrum with a diffraction grating for the purpose of measuring the wavelengths of the emitted radiation, hr the spectrum, she observes a yellow line and finds its wavelength to be 589 nm. (a) Assuming that this is part of the Balmer series, determine the principal quantum number of the initial state, (b) What is unreasonable about this result? (c) Which assumptions are unreasonable 01 inconsistent?arrow_forwardWhat is the minimum frequency of a photon required to ionize: (a) a He+ ion in its ground stare? (b) A Li2+ ion in its first excited state?arrow_forwardIf the current in the Helmholtz coils were 1.6 A, rather than 1 A, and the accelerating voltage were still 100 V, what would the radius of the electron's path be? Give your answer in cm, and enter only the number. Blackboard will accept an answer witin 20% of the value it expects.arrow_forward
- UV radiation has a wavelength of 130 nm and falls on gold metal, to whichelectrons are bound by 5.83 eV. (a) What is the maximum kinetic energy of the ejected photoelectrons? (b) What is the de Broglie wavelength of thesephotoelectrons?arrow_forwardSuppose an electron is confined to a region of length 0.1 nm (of the order of the size of a hydrogen atom) and its kinetic energy is equal to the ground state energy of the hydrogen atom in Bohr's model (13.6 eV). (a) What is the minimum uncertainty of its momentum? What fraction of its momentum is it? (b) What would the uncertainty in kinetic energy of this electron be if its momentum were equal to your answer in part (a)? What fraction of its kinetic energy is it?arrow_forwardA particular star has a radius of 8.46 ✕ 108 m. The peak intensity of the radiation it emits is at a wavelength of 679 nm. (a) What is the energy (in J) of a photon with this wavelength? answer in J (b) What is the star's surface temperature (in K)? (Round your answer to at least the nearest integer.) answer in K (c) At what rate (in W) is energy emitted from the star in the form of radiation? Assume the star is a blackbody, with emissivity e = 1. answer in W (d) Using the results from parts (a) and (c), estimate the rate (in photons/s) at which photons are emitted by the star. answer in photon/sarrow_forward
- Use the thermodynamic identity ?? = ??? − ??? to show that the energy density of a photon gas is proportional to ?arrow_forwardA 279 lb fullback runs the 40 yd dash at a speed of 18.5 ×× 0.1 mi/h. (a) What is his de Broglie wavelength (in meters)? (b) What is the uncertainty of his position?arrow_forwardA CO2 laser produces a cylindrical beam of light with a diameter of 0.850 cm. The energy is pulsed, lasting for 2.00 ns, and each burst contains an energy of 200 mJ. What is the length L of each pulse of laser light? What is the average energy per unit volume u(avg) for each pulse?arrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
- University Physics Volume 3PhysicsISBN:9781938168185Author:William Moebs, Jeff SannyPublisher:OpenStax
University Physics Volume 3
Physics
ISBN:9781938168185
Author:William Moebs, Jeff Sanny
Publisher:OpenStax