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Assignment
Answer the following three questions
1) How would you explain the wave-particle dualism? Provide your explanation by referring to the Young's experiment (two-slits experiment) and the De Broglie equation.
2) Explain the photoelectric effect, by referring to the experiment set up and the physics behind it. In particular, explain the concepts of work function, activation frequency and photon flux.
3) According to the Kronig-Penney model used to derive the band theory of solids (non metals), how would you explain the presence of energy bands in a material, such as a semiconductor? Sketch an example of a 4 bands E vs k diagram within the Brillouin zone. One of the interesting concepts related to the E vs k diagram is the effective mass concept. Explain this concept and how it is related to the diagram.
a 80 kev x-ray undergoes a compton scattering with an electron of tungsten and ejects this electron with energy 15ev.
A 4.90 gram coin is located 17.0 centimeter from the center of a turntable. Find the maximum angular velocity with which turntable can spin without the coin sliding
Imagine that the coefficient of kinetic friction between a certain 15kg box and the floor is 0.35. How hard would you have to push on it to move it at the constant speed of 2.6m/s across the floor.
A jogger accelerates from rest to 3.49 m/s in 2.40 s. A car accelerates from 21.0 to 31.8 m/s also in 2.40 s, Find the magnitude of the acceleration of the jogger
The average speed of a nitrogen molecule in air is about 669 m/s, and its mass is 4.43×10-26 kg. If it takes 2.66×10-13 s for a nitrogen molecule to hit a wall and rebound by the same speed but moving in the opposite direction, what is the magnitude ..
A ferry can travel at an optimal speed of 8 km/h in stillwater measured relative to the shore. What is the optimal speed of the ferry, relative to the shore, if it moves perpendicular to a 6km/h current?
A high diver of mass 70 kg jumps off a board 10meters above the water. what average upward forcedid the water exert on the diver
A 3500 kg parked car, with brakes off and free to move, What percentage of the kinetic energy is lost in the collision
What is the tension T2 in the left-hand cable slanted at an angle of θ2 with respect to the wall? Illustrate what is the angle θ2 which the left-hand cable makes with respect to the ceiling?
A 0.060-kg tennis ball, moving by a speed of5.44m/s , has a head-on collision with a 0.080-kg ball initially moving in the same direction at a speed of 3.80m/s . Suppose that the collision is perfectly elastic.
A spaceship travels with a speed of 0.3 c as it passes by the Earth on its way to a distant star, Determine its length as measured by a person on Earth
he lifting force exerted on an airplane wing varies jointly as the area of the surface and the square of the planes velocity. Determine the lift if the speed is decreased to 80 mph
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