Essential University Physics
4th Edition
ISBN: 9780134988566
Author: Wolfson, Richard
Publisher: Pearson Education,
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Textbook Question
Chapter 29.8, Problem 29.6GI
Lasers 1 and 2 emit light of the same color, and the electric field in the beam from laser 1 is twice as strong as the field in laser 2’s beam. How do their (1) magnetic fields, (2) intensities, and (3) wavelengths compare?
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In Thomson's experimental setup (Figure given below), the length of the deflecting
plate is 3.0 cm and the distance of the screen to the deflecting plate is 1.0m (x axis). With
the applied electrical field of 2.1 x10° V/m, image of the electron beam is observed at the
height of 36 cm (y axis). With the applied magnetic field of 1.2 x 10³T, the image is seen at
the center of the screen with no deflection.
c) If the length of the deflecting plate would be 2.5 cm, where would the beam is observed?
d) Assuming mass of the electron is known and the value is m,=9.1x1031 kg, find the rest
Energy, total energy and the kinetic energy of the electron.
e) Find the relativistic momentum of the electron.
Hint: Use equations in Thomson's experiment for a, b and c. Use relativistic kinematic
equations for d and e by using the velocity you obtained in a.
Deflecting plates-
Cathode
AB
Anode
Fluorescent screen-
High voltage
Magnet
In Thomson's experimental setup (Figure given below), the length of the deflecting
plate is 3.0 cm and the distance of the screen to the deflecting plate is 1.0m (x axis). With
the applied electrical field of 2.1 x10° V/m, image of the electron beam is observed at the
height of 36 cm (y axis). With the applied magnetic field of 1.2 x 10° T, the image is seen at
the center of the screen with no deflection.
a) Find the initial velocity of the electron.
b) Find the q/m for the electron.
c) If the length of the deflecting plate would be 2.5 cm, where would the beam is observed?
d) Assuming mass of the electron is known and the value is m=9.1x1031 kg, find the rest
Energy, total energy and the kinetic energy of the electron.
e) Find the relativistic momentum of the electron.
Hint: Use equations in Thomson's experiment for a, b and c. Use relativistic kinematic
equations for d and e by using the velocity you obtained in a.
Deflecting plates-
Cathode
AB
Anode
Fluorescent screen-
High voltage…
What is the wavelength, in nm, of a photon with energy (a) 0.30 eV, (b) 3.0 eV, and (c) 30 eV? For each, is this wavelength visible light, ultraviolet, or infrared?
Chapter 29 Solutions
Essential University Physics
Ch. 29.2 - Would you expect to find a magnetic field between...Ch. 29.5 - Prob. 29.3GICh. 29.6 - Prob. 29.4GICh. 29.7 - Prob. 29.5GICh. 29.8 - Lasers 1 and 2 emit light of the same color, and...Ch. 29 - Why is Maxwells modification of Ampres law...Ch. 29 - Prob. 2FTDCh. 29 - Prob. 3FTDCh. 29 - Prob. 4FTDCh. 29 - When astronomers observe a supernova explosion in...
Ch. 29 - The Sun emits about half of its...Ch. 29 - An LC circuit is made entirely from...Ch. 29 - Prob. 8FTDCh. 29 - The intensity of light drops as the inverse square...Ch. 29 - Electromagnetic waves dont readily penetrate...Ch. 29 - Prob. 11ECh. 29 - Prob. 12ECh. 29 - The fields of an electromagnetic wave are E = Ep...Ch. 29 - A radio waves electric field is given by the...Ch. 29 - A light-minute is the distance light travels in 1...Ch. 29 - Your intercontinental telephone call is carried by...Ch. 29 - An airplanes radar altimeter works by bouncing...Ch. 29 - Roughly how long does it take light to travel 1...Ch. 29 - If you speak via radio from Earth to an astronaut...Ch. 29 - What are the wavelengths of (a) a 100-MHz FM radio...Ch. 29 - A 60-Hz power line emits electromagnetic...Ch. 29 - Microwave ovens for consumers use operate at 2.45...Ch. 29 - Prob. 23ECh. 29 - Prob. 24ECh. 29 - Vertically polarized light passes through a...Ch. 29 - Prob. 26ECh. 29 - Prob. 27ECh. 29 - Estimate the peak electric field inside a 1.1-kW...Ch. 29 - Prob. 29ECh. 29 - Prob. 30ECh. 29 - Your university radio station has a 5.0-kW radio...Ch. 29 - Example 29.2: A green laser pointer produces...Ch. 29 - Example 29.2: An infrared laser that sends signals...Ch. 29 - Example 29.2: An AM radio station broadcasts with...Ch. 29 - A public FM radio station broadcasts at 88.7 MHz....Ch. 29 - When the cellphone of Example 29.4 find itself in...Ch. 29 - What transmitter power would be needed for a...Ch. 29 - The Voyager 1 spacecraft, now in interstellar...Ch. 29 - Example 29.4: Rovers on the surface of Mars...Ch. 29 - Prob. 40PCh. 29 - Prob. 41PCh. 29 - The medical profession divides the ultraviolet...Ch. 29 - Prob. 43PCh. 29 - A polarizer blocks 75% of a polarized light beam....Ch. 29 - Prob. 45PCh. 29 - Unpolarized light of intensity S0 passes first...Ch. 29 - Prob. 47PCh. 29 - Prob. 48PCh. 29 - High microwave intensities can cause biological...Ch. 29 - Use the fact that sunlight intensity at Earths...Ch. 29 - A quasar 10 billion light-years from Earth appears...Ch. 29 - Prob. 52PCh. 29 - Prob. 53PCh. 29 - Find the peak electric and magnetic fields 1.5 m...Ch. 29 - Prob. 55PCh. 29 - Prob. 56PCh. 29 - A laser produces an average power of 7.0 W in a...Ch. 29 - Prob. 58PCh. 29 - A 65-kg astronaut is floating in empty space. If...Ch. 29 - Prob. 60PCh. 29 - A white dwarf star is approximately the size of...Ch. 29 - Prob. 62PCh. 29 - In a stack of polarizing sheets, each sheet has...Ch. 29 - Prob. 64PCh. 29 - Prob. 65PCh. 29 - Maxwells equations in a dielectric resemble those...Ch. 29 - Prob. 67PCh. 29 - Prob. 68PCh. 29 - Earth emits infrared radiation at very rearly the...Ch. 29 - Prob. 70PCh. 29 - Prob. 71PCh. 29 - The table below shows the intensity of the radio...Ch. 29 - If a sunlight-powered sailing spacecraft...Ch. 29 - Prob. 74PPCh. 29 - A sail capable of propelling a spacecraft to the...Ch. 29 - Prob. 76PP
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