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Problem 1. With light of wavelength 520 nm, photoelectrons are ejected from a metal surface with a maximum speed of 1.78 x 10^5 m/s.a) What wavelength would be needed to vie a maximum speed of 4.81 x 10^5 m/s?b) Can you guess what metal it is?
Problem 2. In positron emission tomography an electron and positron annihilate, and two photons of the same energy are detected. What is the energy and the wavelength of the photon? The electron-positron pair can be assumed stationary before the annihilation.
Problem 3. The Compton scattering.
Suppose a photo scatters off of a free proton. What is the maximum possible change of the wavelength?
Problem 4. Doubly ionized lithium, Li^2+, absorbs a photon and jumps from the ground state to its n = 3 level. What was the wavelength of the photon?
Bonus Question. All other things being equal, which would be more likely to exhibit its wave nature - a proton or an electron - and why?
A sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere.
A resistor is in the shape of a cube, with each side of resistance R . Find the equivalent resistance between any two of its adjacent corners.
Question: Field and force with three charges? What is the electric field at the location of Q1, due to Q 2 ?
What is the maximum displacement of the bridge deck?
What is the magnitude of the current in the wire as a function of time?
Questions on blackbody, Infra-Red Detectors & Optic Lens and Digital Image.
Illustrate the cause of the components accelerating from rest down the conveyor.
Calculate the dc voltage applied to the circuit.
Quadrupole moments in the shell model
Determine the tension in each string
Calculate the smallest coefficient of static friction necessary for mass A to remain stationary.
Evaluate maximum altitude?
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