+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 755 N diver drops fromw a board 10.0 m aabove watersserface. Find the divers speed 5.00m above the waters serfface. Then find the divers speed just before hitting the wate
In a circus performance, a monkey is strapped to a sled and bothare given an initial speed of 5.0 m/sup a 25.0° inclined track. The combined mass of monkeyand sled is 24 kg,
Ellen and Angela each have a mass of 45 kg, and they are moving together with a speed of 10.0 m/s. What is their combined kinetic energy? What is the ratio of their combined m
The block on the left hass a mass of 0.40 kg and is initially moving to the right at 2.4 m/s toward a second block of mass 0.50 kg that is initially at rest. What is the vel
An airplane is sent on a rescue mission to help a stranded explorer near the South Pole. The plane cannot land, but instead drops a supply package of mass m = 58 kg while it
From the top of a tall building, a gun is fired. The bullet leavesthe gun at a speed of 340 m/s, parallel to the ground. As thedrawing shows, the bullet puts a hole in a win
A motorcycle has a constant speed of 23.0 m/s as it passes over the top of a hill whose radius of curvature is 149 m. Find the magnitude of the normal force that acts on the c
Assume all batteries are ideal unless told otherwise. What is the voltage across six 1.5V batteries when they are connected three in parallel with one another and this combin