Physics 251 - Special projects

Each group can chose one and only one project. You may chose to do your own project. In this case, you need to have the approval of instructor to do so, since we might not have all required equipment.

Please register as soon as possible and no later than the special project start day.

During registration make sure you list all members of your group.

• Wednesday class registration form
• Thursday morning class registration form
• Thursday afternoon class registration form

He-Ne laser

Find what is needed to make a laser and build He-Ne laser. Explore the optical cavity modes and light polarization. 2 setups.

LED output and temperature. Why does it change color.

Find dependence between the LED IV curve, emitting wavelength, and its temperature. You will need some knowledge of basic electronics. 2 setups.

What is inside fluorescent light bulb and a mystery tube

Identify substances inside of a fluorescent bulb without taking it apart. 2 setups.

Refractive index of air

Using Michelson interferometer find the refractive index of air. 2 setups.

Time reversal in physics: can LED be a photo diode?

Study how efficient is this process. You will need some knowledge of basic electronics. 2 setups.

Single photon interference

Do it right this time and get a definitive answer about validity of the single photon interference. 2 setups.