Modern Physics
2nd Edition
ISBN: 9780805303087
Author: Randy Harris
Publisher: Addison Wesley
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Question
Chapter 3, Problem 28E
To determine
The minimum wavelength to be expected in X-rays produced by a television picture tube.
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. (a) Find at what voltage on the X-ray tube, the emitted X-ray radiation has minimumwavelength λmin = 10-1nm? (b) Calculate energy of corresponding X-ray photon (in Joules and keV).
What minimum accelerating voltage would be required to produce an x-ray with a wavelength of 70.0 pm?
What is the thickness of aluminum required to reduce the 200Kev rays to 10% of their original value? Note that the thickness of half the value when energy Kev 200 in aluminum is 2.14cm
Chapter 3 Solutions
Modern Physics
Ch. 3 - Prob. 1CQCh. 3 - Prob. 2CQCh. 3 - Prob. 3CQCh. 3 - Prob. 4CQCh. 3 - Prob. 5CQCh. 3 - Prob. 6CQCh. 3 - Prob. 7CQCh. 3 - A ball rebounds elastically from the floor. What...Ch. 3 - Prob. 9CQCh. 3 - Prob. 10CQ
Ch. 3 - Prob. 11ECh. 3 - Prob. 12ECh. 3 - Prob. 13ECh. 3 - Prob. 14ECh. 3 - Prob. 15ECh. 3 - Prob. 16ECh. 3 - Prob. 17ECh. 3 - What is the stopping potential when 250 nm...Ch. 3 - Prob. 19ECh. 3 - Prob. 20ECh. 3 - Prob. 21ECh. 3 - Prob. 22ECh. 3 - Prob. 23ECh. 3 - Prob. 24ECh. 3 - Prob. 25ECh. 3 - Prob. 26ECh. 3 - Prob. 27ECh. 3 - Prob. 28ECh. 3 - Prob. 29ECh. 3 - Prob. 30ECh. 3 - Prob. 31ECh. 3 - Prob. 32ECh. 3 - Prob. 33ECh. 3 - Prob. 34ECh. 3 - Prob. 35ECh. 3 - Prob. 36ECh. 3 - Verify that the Chapter 2 formula KE=mc2 applies...Ch. 3 - Prob. 38ECh. 3 - Prob. 39ECh. 3 - Prob. 40ECh. 3 - Prob. 41ECh. 3 - Prob. 42ECh. 3 - Prob. 43ECh. 3 - Prob. 44ECh. 3 - Prob. 45ECh. 3 - Prob. 46ECh. 3 - Prob. 47CECh. 3 - Prob. 49CECh. 3 - Prob. 50CECh. 3 - Prob. 51CECh. 3 - Prob. 52CECh. 3 - Prob. 53CECh. 3 - Prob. 54CECh. 3 - Prob. 55CE
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- Experiments are performed with ultra-cold neutrons having velocities as small as 1.00 m/s. (a) What is the wavelength of such a neutron? (b) What is its kinetic energy in eV?arrow_forwardWhy does the energy of characteristic x rays become increasingly greater for heavier atoms?arrow_forwardWhat is the longest wavelength of radiation that can eject a hotoelectron from potassium, given the work function of potassium 2.24 eV? Is it in the visible range?arrow_forward
- At what velocity does a proton have a 6.0-fm wavelength (about the size of a nucleus)? Give your answer in units of c.arrow_forwardX-rays are produced by striking a target with a beam of electrons. Prior to striking the target, the electrons are accelerated by ail electric field through a potential energy difference: U=eV, where e is the charge of an electron and V is the voltage difference. If V = 15,000 volts, what is the minimum wavelength of the emitted radiation?arrow_forwardThe work function for potassium is 2.26 eV. What is the cutoff frequency when this metal is used as photoelectrode? What is the stopping potential when for the emitted electrons when this photo electrode is exposed to radiation of frequency 1200 THz?arrow_forward
- A carbon dioxide laser used in surgery emits infrared radiation with a wavelength of 10.6 µm . In 1.00 ms, this laser raised the temperature of 1.00 cm of flesh to and evaporated it. (a) How many photons were required? You may assume that flesh has the same heat of vaporization as water, (b) What was the minimum power output during the flash?arrow_forwardAn x-ray is produced by electrons accelerated under a voltage of 11.6 kV. What is the shortest wavelength of the generated x-rays? Express your answer in picometers with one (1) decimal place.arrow_forwardA potential difference of 20 kV is applied across an X-ray tube. The minimum wavelength of X-rays generated is Å.arrow_forward
- A 900WX-ray tube operates at a DC potential difference of 30kV. Calculate the minimum wavelength of the X-rays produced Calculate the current through the tube. If 99% of the power is dissipated as heat, estimate the number of X-ray photons produced per second.arrow_forwardAttenuation coefficient of bone is 600 m⁻¹ for x-rays of energy 20 keV and intensity of beam of x-rays is 20 Wm⁻², then intensity of beam after passing through a bone of 4mm isarrow_forwardThe potential difference between the target and the cathode of an X-ray tube is 50kV and the current in the tube is 20mA. Only 1% of the total energy supplied is emitted as X-radiation. What is the maximum frequency of the emitted radiation? At what rate must heat be removed from the target in order to keep it at a steady temperature.arrow_forward
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