College Physics
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ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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A photon has an energy of 1.9 meV (milli electron Volt). What is the wavelength of this photon, expressed in micrometers? Keep four significant digits.
And the answer is NOT 6.543
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- Current Time.03.31 1. A magnesium surface has a work function of 3.10 eV. Electromagnetic waves with a wavelength of 200 nm strike the surface and eject electrons. Find the maximum kinetic energy of the ejected electrons. Express your answer in electron volts. eV 16xet16arrow_forwardPhotons of a certain infrared light have an energy of 1.70x10 J. (a) What is the frequency of this IR light? Hz (b) Use A = c/f to calculate its wavelength in nanomneters. nmarrow_forwardPlanck’s constant has the value h = 6.626 × 10–34 joule-seconds (J-s), and the speed of light is c = 3 × 108 m/s. Using these values, calculate the wavelength carried by photons emitted with an energy of 1.1 × 10-19 J.arrow_forward
- What is the kinetic energy of each electron in a beam of electrons if the beam produces a diffraction pattern of a crystal which is similar to that of a beam of 1.00 eV neutrons? (knowing that electron mass is 9.11*10^-31 kg and neutron mass is 1.67*10^-26 kg). What are the specific equations that are being used in this problem?arrow_forwardWhat is the energy of a photon if it's frequency is 1.00s-1?arrow_forward3.1. What is the de Broglie wavelength of an electron that has been accelerated through a potential difference of AV = 150 V?arrow_forward
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