6D Interference – Physics Demos

10. Interference From Two Sources
- 6D10.05 Interference Model See 3B50.55.
- 6D10.10 Double Slits and Laser Shine a laser beam through double slits of different widths and spacing.
- 6D10.11 Cornell Plate-Two Slit
- 6D10.20 Microwave Two Slit Interference Microwave two slit interference.
- 6D10.25 Microwave Double Source Interference 12 cm microwave is set up with two transmitters.
- 6D10.38 Cylindrical Tube Interference The ring pattern from shining a point source down a reflecting cylindrical tube results from the interference of two virtual sources.
- 6D10.41 Fresnel Biprism A laser through a Fresnel biprism gives two interference sources.
- 6D10.90 3D Interference Pattern Direct the laser interference pattern from the back of the room off a mirror and toward the students into a smoke filled box.
15. Interference of Polarized Light
- 6D15.10 Interference of Polarized Light A polarized laser beam passes through a calcite crystal and a polarizing sheet is interposed and rotated to make fringes appear and disappear.
- 6D15.20 Total Interference Show the standard interference patterns with Polaroids in each path aligned parallel, then rotate one and the pattern disappears.
- 6D15.25 Interference of Polarized Light Polarized light is passed through a double slit, the two output beams are polarized perpendicularly, and a third polarizer can be used as an analyzer.
- 6D15.30 Interference of Polarized Light Put a quarter wave plate in one path of a Michelson interferometer and show the waves don’t have to have the same polarization to interfere.
20. Gratings
- 6D20.10 Multiple Slit Interference Pass a laser beam through three sets of multiple slits on the Cornell slide.
- 6D20.11 Project a Coarse Grating A course grating is placed between an illuminated slit and the projection lens. A fine grating must be placed near the screen.
- 6D20.15 Gratings and Laser A laser beam passed through a grating is compared with a beam of white light passed through the same grating.
- 6D20.20 Projected Spectra With Grating White light, mercury, and sodium sources are passed through 300 and 600 lines per mm gratings.
- 6D20.31 Measuring Wavelength with a Ruler A laser beam is diffracted at grazing incidence off the rulings of an engraved steel ruler.
- 6D20.32 Compact Disk Grating Information on the pit and groove sizes and an example setup.
- 6D20.50 Crossed Gratings and Laser A laser beam passed through a fine mesh screen produces interesting interference patterns.
- 6D20.55 Fine Mesh and Laser Shine a laser through a fine wire mesh to produce a 2-dimensional interference pattern.
- 6D20.55 Two Dimensional Grating View an automobile headlamp through a small square of silk.
- 6D20.56 Hole Gratings A source for hole gratings of several spacings, sizes, and arrangements.
- 6D20.63 Dust on a Mirror Dust a bathroom mirror and hold a small light as close to the eye as possible.
30. Thin Films
- 6D30.10 Newton’s Rings Reflect white light off Newton’s rings onto the wall.
- 6D30.11 Newton’s Rings – HeNe Not the standard. The laser light reflected from the curved and flat surfaces of a plano-convex lens is superimposed on a screen.
- 6D30.20 Soap Film Interference Reflect white light off a soap film onto a screen.
- 6D30.30 Air Wedge with Sodium Light Diffuse sodium light with frosted glass before reflecting it off two plane glass plates.
- 6D30.40 Mica Sheet Reflect light from a mercury point source off a thin sheet of mica onto the opposite wall. Derivation.
40. Interferometers
- 6D40.10 Michelson Interferometer Pass laser light through a interferometer onto the wall to project fringes onto a screen.
- 6D40.27 Lloyd’s Mirror A front surface mirror is brought close to an expanded laser beam at a very small grazing angle. Interference lines are formed on a screen.
- 6D40.62 Doppler Shift With Microwaves Some of the transmitted signal and the signal received after reflection off a moving object are fed to a mixer.