IWP Applets for Chapter 30
|
ID/Type |
Web Link or WA Question Code |
Local download |
Launch from browser |
Description |
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E.30.01t |
APB-30-01-01tut |
peffect-02.iwp |
peffect-02.iwp |
Run the applet to shine a source of light of the given frequency
on the emitter. Photoelectrons are ejected from the emitter with varying kinetic
energies up to a maximum value determined by the frequency of the light and the
work function of the emitter. If a battery is used to place a potential
difference across the emitter and collector, the electron current can be stopped
with the correct selection of the sign and magnitude of the battery voltage.
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|
E.30.01t |
APB-30-01-02b |
peffect-05.iwp |
peffect-05.iwp |
When an emitter is illuminated with light of the given frequency,
the stopping potential for photoelectrons is found to be 0.448 V. What are a)
the maximum kinetic energy of the photoelectrons, b) the work function of the
emitter and c) the cutoff frequency? |
|
E.30.03t |
APB-30-03-01tut |
compton-04.iwp |
compton-04.iwp |
A light wave initially moving to the right is scattered by an electron initially at rest at the origin. While the electron appears to be moving very slowly after the collision, this must be considered in relation to the distance and time scales. The grid size for distance is 1E-10 meter. The time step is 4E-20 second. Hence, the electron is actually moving quite fast. The wavelength of the light is increased by the collision, since the light gives energy to the electron. However, the amount of the wavelength shift is so small that it's not obvious on the animation. |
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