Stopping potential (V) 7.0 6.0 5.0 4.0 3.0 2.0 1.0 f(10¹5 Hz) 0 0.50 1.0 1.5 2.0 2.5 3.0 Fig. 1 The graph in Fig. 2 shows the stopping potential as a function of the frequency of the incident light falling on a metal surface. Find the work function of this metal. A. 5.169 eV. B. 3.422 eV. C. 1.089 eV. D. 0.773 eV.

Stopping potential (V) 7.0 6.0 5.0 4.0 3.0 2.0 1.0 f(10¹5 Hz) 0 0.50 1.0 1.5 2.0 2.5 3.0 Fig. 1 The graph in Fig. 2 shows the stopping potential as a function of the frequency of the incident light falling on a metal surface. Find the work function of this metal. A. 5.169 eV. B. 3.422 eV. C. 1.089 eV. D. 0.773 eV.

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter6: Photons And Matter Waves

Section: Chapter Questions

Problem 140AP: (a) Find the momentum of a 100-keV X-ray photon. (b) Find the velocity of a neutron with the same...

See similar textbooks

Similar questions

1If an electron moves from n = 5 to n = 1, what wavelength of light is emitted? (h = 6.626 x 10-34, 1 eV = 1.6 x 10-19 J) 4008 nm 434 nm 95 nm 1281 nm 2Which of the following best describes a frame of reference? an experiment that proved that Earth did not have an aether wind the theory that describes the behavior and characteristics of objects moving at relativistic speeds the effect of the slowing of time as an object moves with high speeds a point in which someone relates the behavior of an object from one perspective professor can you answer the 2 questions please
The velocity of a proton emerging from a Van de Graaff accelerator is 25.0% of the speed of light. (a) What is the proton’s wavelength? (b) What is its kinetic energy, assumingit is nonrelativistic? (c) What was the equivalent voltage through which it was accelerated?
A) Astronomers measure the peak wavelength of a nearby star to be 410 nm. What is the star's temperature? B) How much energy does a single photon of light have at this wavelength? C) An electron bound in an unknown metal requires 1.45E-19 ] of energy under the photoelectric effect to become free of the metal. How much kinetic energy would it have if struck by the photon froft part (b)? D) What is the final speed of the elctron from part (c)?
A satellite in Earth orbit maintains a panel of solar cells of area 2.60 m2 perpendicular to the direction of the Sun’s light rays. The intensity of the light at the panel is 1.39 kW/m2. (a) At what rate does solar energy arrive at the panel? (b) At what rate are solar photons absorbed by the panel? Assume that the solar radiation is monochromatic, with a wavelength of 550 nm, and that all the solar radiation striking the panel is absorbed. (c) How long would it take for a “mole of photons” to be absorbed by the panel?
Suppose a proton is moving at 1.25 % of the speed of light. a)Calculate the wavelength, in meters, of a photon that has the same momentum as this proton. b) What is the energy of the photon, in megaelectron volts? c) What is the kinetic energy of the proton, in megaelectron volts?
A firefly glows by the direct conversion of chemical energy to light. The light emitted by a firefly has peak intensity at a wavelength of550 nm.a. What is the minimum chemical energy, in eV, required to generate eachphoton?b. One molecule of ATP provides 0.30 eV of energy when it is metabolized in a cell. What is the minimum number of ATP molecules that must be consumed in the reactions that lead to the emission of one photon of 550 nm light?
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?
H) i) When does a beam of light just have one frequency?ii) Why only the atomic scale experiences quantum effects?iii) If atoms are primarily made of empty space, why don't they collapse?iv) Why are electrons in an atom unable to reach the nucleus?
b) Compare these wavelengths with that of an electron traveling at 0.999c.
(a) Calculate the velocity of electrons that form the same pattern as 450-nm light when passed through a double slit.(b) Calculate the kinetic energy of each and compare them.(c) Would either be easier to generate than the other?Explain.
A photon has momentum of magnitude 2.48 x 10-28 kg.m/s. (a) What is the kinetic energy of this photon? (b) What is the wavelength of this photon? (c) In what region of the electromagnetic spectrum does it lie?
A photoelectron is emitted from a barium surface illuminated by light of 6.5 x 10^14 Hz. To. What is the wavelength of light in nm? b. If barium has a work function of 2.48 eV, what is the kinetic energy of the photoelectron in eV?