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Consider an optical gain medium that has two levels at E 1=1.50 eV and E 2=3.50 eV.
a) What is the resonant absorption wavelength?
b) What is the spontaneous emission wavelength?
c) What is the stimulated emission wavelength?
d) Explain the differences between the light produced by spontaneous and stimulated emission.
The diagram on the left below shows two resistors in series with an ideal battery, in the diagram on the right; a third resistor has been added in parallel with R2. Calculating the resistance, current and potential difference.
A grindstone of a radius 4 m is firstly spinning with a radius of 8 rad/s. The angular speed is then increased to 12 rad/s over next 4.0 seconds. Suppose that the angular acceleration is constant. What is the average angular speed of grindstone.
A 10 kg block sits motionless on a table in spite of an applied horizontal force of 2 N. What are the magnitudes of the reaction force
A ball rolls off a table with a horizontal velocity of 5 m/s If it takes 0.6 secs for it to reach the floor A. What is the verticle componet of the balls velocity just before it hits the floor? (use g= 10 m/s^2) B. What is the horizontal componet ..
A cart of mass M = 1.2 kg can roll without friction on a level track. A light string draped over a light, frictionless pulley connects the cart to a hanger with mass m = 0.5 kg. The cart is released from rest, allowing it to roll, pulled by falling h..
What is the average force exerted on the ball. How fast (in ) must a centrifuge rotate if a particle 6.50 from the axis of rotation is to experience an acceleration of 125,000 's.
A sample is bombarded by incident X-rays, and free electrons in the sample scatter some of the X-rays at an angle of -0= 122.0 degrees, Determine the wavelength (in nm) of the incident X-rays
Two identical diverging lenses are separated by 16 cm. The focal length of each lens is -8.0 cm. Determine the final image distance relative to the lens on the right
A cylinder contains a piston on each side of which is one kilomole of an ideal gas. The walls of the cylinder are diathermal, What is the change in the Helmholtz potential
This is accomplished using two small rockets, each with 150-N thrust, that are mounted on the rim of the station.
Find out the maximum height that the rocket reaches (neglecting air resistance) when the fuel is exhausted.
Explain how do Decisions concerning span of management and the use of committees and coordination techniques affect basic organizational structure
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