UP+203+Experiments


 * Tentative List**

1) Measuring magnetic field variations inside conductors: experimental verification of Ampere's law in an electrolyte.

2) Measurement of charge to mass ratio (e/m) of electrons using cathode rays: charged particles are bent in magnetic fields depending on their e/m.

3) Measurement of decimeter waves emitted by an antenna: understanding of transmitting and receiving antennas; intensity pattern, polarization.

4) Experiment which quantitatively illustrates eddy currents and measures drag due to them; other similar experiment that illustrates Faraday's law (changing B induces EMF).

5) Measuring skin effect (that majority of current flows on the surface of the conductor because of EMF due to time varying current, and hence B-field) and its frequency dependence in different metallic cables.

6) Measuring dielectric constant of materials at varying frequencies; or capacitor response as a function of frequency.

7) Characterization of polarization of different light sources using quarter and half wave plates by measuring transmitted intensity; conversion of linear to circular polarization and vice-versa.

8) Laser Doppler velocimetry: measure frequency shift of two light rays scattered by particles moving in a liquid; to measure the flow pattern in pipe flow.

9) some Waveguide experiment (I think this may have been done in second semester; but this and a motor/generator experiment should be switched)

10) a basic laser experiment: characterization of the laser; optical pumping, lifetime of excited states, Einstein A & B coefficients; spectroscopy of emitted radiation.

11) Fabry-Perot resonator: measurement of coherence length of laser; stability of the resonator; multiple beam interference, spectral frequency and mode analysis; finesse.

12) Mach-Zehnder interferometer: to understand the principle of complementarity (wave & particle nature of photons); interference of laser beams with common polarization angle.