+1-415-670-9189
info@expertsmind.com
What do you notice about the emitted photons
Course:- Physics
Reference No.:- EM13795672




Assignment Help
Assignment Help >> Physics

1) Laser medium basics..

A. Pumping a two state system.

This simulation uses an "optical pump" as an energy source for a laser. Turn the light source on a medium level with the preset wavelength. What do you observe about the emitted photons? (Are they spontaneous emissions, stimulated emissions or both... and how can you identify this?)

When you change the intensity of the light source to a very low level, what do you notice about the emitted photons?

When you change the intensity of the light source to a very high level, what do you notice about the emitted photons?

When you have the intensity at a medium level but decrease the lifetime, what do you notice about emissions?

When you have the intensity at a medium level but increase the lifetime, what do you notice about emissions?

When you tune the light to a color that has a lower energy than the preset color, what do you observe?

When you tune the light to a color that has a higher energy than the preset color, what do you observe?

B. Pumping a three state system.

When you change to a three state system, can you still only pump electrons to a higher energy level with the red light or is there another light energy that works now? Explain.

What characteristics do you observe about the emission events when you pump with the additional color? (Are all emissions the same color, are they stimulated, spontaneous, etc.?)

Click on "display photons emitted from upper state.") What transition do these photons represent, and what region of the spectrum are these photons in?

When you increase the lifetime of the upper state what happens to the emission events?

When you in increase the lifetime of the lower state what happens to the emission events?




Put your comment
 
Minimize


Ask Question & Get Answers from Experts
Browse some more (Physics) Materials
A cylindrical air capacitor with a length of 15.6m stores an amount of energy equal to 3.30×10?9J, Calculate the ratio of the radii of the inner and outer conductors
A radar system can measure the time delay between the reflected and transmitted wave pulses from a distant airplane with an accuracy of 0.96 ps. Find the accuracy in the det
A particle of charge 3.5x10-19 C and mass 16.51x10-27 kg moving at 4.5x106 m/s enters a 0.0047 Tesla magnetic field. What is the radius of the circular orbit traveled by this
A 2.0 kg and a 1.0 kg ball are connente by a rigid massles rod whose length is 1 m. It is spinning ccw at 20 rpm. What torque will bring the balls to a stop in 5 s. The answ
two forces one of which is double the other has resultant of 260N. If the direction of larger force is reversed and the other remains unaltered, the resultant reduces to 180
Pleasseee helpp and explain! The person shown is holding his arm out horizontally with a 3.50 weight in his hand. This weight is 60.0 from the shoulder joint. What is the te
Again starting at 293 K, the steel rod is replaced by a brass rod 1.92 m long, also placed 0.6 cm from the aluminum rod and clamped tight on its other end. At what absolute
The fixed-interest investment would be worth $176,182. Suppose the probability of equities rising 6% per year is 60% and the probability that they rise 10% per year is 40%.