EBK PHYSICS FOR SCIENTISTS & ENGINEERS
5th Edition
ISBN: 9780134296074
Author: GIANCOLI
Publisher: VST
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Chapter 37, Problem 12Q
To determine
Whether wave theory and particle theory can be distinguished by referring the intensity of light and distance from the source.
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What is the energy of a light quantum (photon) which has a wavelength of 600nm? Compare the energy with the electron wave energy calculated in problem 2 (6.6935 x 10-25) and disscuss the difference.
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Chapter 37 Solutions
EBK PHYSICS FOR SCIENTISTS & ENGINEERS
Ch. 37 - Prob. 1QCh. 37 - Prob. 2QCh. 37 - Prob. 3QCh. 37 - Prob. 4QCh. 37 - Prob. 5QCh. 37 - Prob. 6QCh. 37 - Prob. 7QCh. 37 - Prob. 8QCh. 37 - Prob. 9QCh. 37 - Prob. 10Q
Ch. 37 - Prob. 11QCh. 37 - Prob. 12QCh. 37 - Prob. 13QCh. 37 - Prob. 14QCh. 37 - Prob. 15QCh. 37 - Prob. 16QCh. 37 - Prob. 17QCh. 37 - Prob. 18QCh. 37 - Prob. 19QCh. 37 - Prob. 20QCh. 37 - Prob. 1PCh. 37 - Prob. 3PCh. 37 - Prob. 7PCh. 37 - Prob. 9PCh. 37 - Prob. 13PCh. 37 - Prob. 25PCh. 37 - Prob. 26PCh. 37 - Prob. 27PCh. 37 - Prob. 32PCh. 37 - Prob. 34PCh. 37 - Prob. 37PCh. 37 - Prob. 45PCh. 37 - Prob. 52PCh. 37 - Prob. 76GPCh. 37 - Prob. 77GP
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- What is the momentum of a 4-cm microwave photon?arrow_forwardA radio transmitter broadcasts with a power of 9.73 kW and a frequency of 91.5 MHz. At what distance will a circular dish antenna with a diameter of 100 m intercept 1 photon/s. Give your answer in units of light-years (e.g. 0.450 for 0.450 light years) Round your answer to 3 decimal places. Add your answer Question 2 A light beam moving with velocity c along the x-axis approaches a space-ship moving with velcity 0.9c along the y-axis. The velocity of the light beam relative to the space ship is: A >c B) less than c but greater than 0.9c c) <.9carrow_forwardThis question relates to the practicality of searching for intelligent life in other solar systems by detecting their radio broadcasts (or aliens find us from ours). The closest stars are 4 light years away from us. How far away must you be from a 460 kHz radio station with power 50.0 kW for there to be only one photon per second per square meter? Assume that the photons spread out spherically. The area of a sphere is 4??24πr2. b) How many lightyears away is this?arrow_forward
- What is the frequency in Hertz of an X-ray with wavelength (9.00x10^-2) nm? (Give your answer to 3 sf). Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answerarrow_forwardThis question relates to the practicality of searching for intelligent life in other solar systems by detecting their radio broadcasts (or aliens find us from ours). The closest stars are 4 light years away from us. How far away must you be from a 881 kHz radio station with power 50.0 kW for there to be only one photon per second per square meter? Assume that the photons spread out spherically.arrow_forward) a) What temperature is required for a black body spectrum to peak in the X-ray band? (Assume that E = 1 keV). What is the frequency and wavelength of a 1 keV photon? b) What is one example of an astrophysical phenomenon that emits black body radiation that peaks near 1 keV? c) What temperature is required for a black body spectrum to peak in the gamma-ray band with E = 1 GeV? What is the frequency and wavelength of a 1 GeV photon? d) What is one example of an astrophysical phenomenon that emits black body radiation that peaks at 1 GeV?arrow_forward
- (a) 620 nanometers (nm)? (b) What are the energy and momentum of a photon of red light of wavelength What is the wavelength (in nm) of photons of energy 2.40 eV? 1.arrow_forwardLet's say that a photon carries an energy equivalent to 620 eV (electron volts). Knowing that h*c = 1240 eV*nm, what type of radiation is this photon?arrow_forwardCosmic rays are highly energetic particles travelling through space. How fast must a cosmic ray proton be travelling to have a de Broglie wavelength of 10 fm (femtometre)? Express you answer as a percentage of the speed of light, c, Round your answer to the nearest 0.1 percent (for example, 56.1%)arrow_forward
- . Find the momentum of a photon in eV/c and in kg·m/s if the wavelength is (a) 400 nm, (b) 1 Å = 0.1 nm, (c) 3 cm, and (d) 2 nm.arrow_forwardWhen we model light (EM radiation) as a particle, we call it a photon a packet of energy. How does this work with the model of light as a wave? To think through this, answer the following: If the intensity of a beam of light is related to the number of photons passing per second, how would you explain the intensity of light using the model of light as a wave? What feature (wavelength, frequency, amplitude, oscillation, etc.) can be a measure of intensity and why do you think so? Enter your answer herearrow_forwardSuppose 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?arrow_forward
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