Diffraction distribution of single slit
Interference of double slits
Bragg diffraction
Malus' law
Introduction
Microwave and lightwave are both electromagnetic waves. They share common phenomena of all waves, such as reflection, refraction, polarization, interference, and diffraction. However, as the wavelength of a microwave is about 4 orders of magnitude larger than that of a visible lightwave, the experimental phenomena and apparatus of microwave are different.
This LEEI-62 experimental system of microwave interference, diffraction and polarization consists of a microwave transmitter with a variable attenuator, a microwave detector and meter display, a transmitting horn and a receiving horn, as well as other accessories such as single slit, double slits, beam splitter, crystal model, etc. It can provide quantitative measurements of a series of experiments such as:
1. Verify reflection law of electromagnetic wave
2. Measure intensity distribution of single-slit diffraction
3. Measure intensity distribution of double-slit interference
4. Measure microwave wavelength through interference of Michelson interferometer
5. Study polarization and verify Malus' law
6. Verify Bragg diffraction of crystal model
The instruction manual contains experimental configurations, principles, step-by-step instructions, and examples of experiment results. Please click Experiment Contents and Results to find more information about this apparatus.
Specifications
| Item | Specifications |
| Frequency | Range: 8.6~9.6 GHz; draft: ± 5×10-4/15-min; display error: ±40 MHz |
| Output power | >20 mW |
| Working voltage | DC 12 V |
| Wave form | Equal amplitude |
| Internal modulation | Square-wave at 1 kHz |
| Output waveguide dimensions | Inner: 22.86 mm × 10.16 mm |
| Standing-wave coefficient | ≤ 1.2 (synthesis voltage) |
| Output microwave wavelength | λ =32.02 mm (factory preset) |
| Horn antenna | Gain ~ 20 dB; lobe width H 200 & E 160 |
Part List
| Description | Qty |
| 3-cm solid state microwave signal source | 1 |
| Base | 1 |
| Platform | 1 |
| Fixed arm | 1 |
| Horn antenna | 2 |
| Variable attenuator | 1 |
| Crystal detector | 1 |
| Indicator meter | 1 |
| Video cable | 1 |
| Reflection plate (aluminum) | 1 |
| Single-slit plate (slit width adjustable) | 1 |
| Double-slit plate (slit width adjustable; barrier=50 mm) | 1 |
| Partial transparent plate (glass) | 1 |
| Simulated crystal with support | 1 |
| Translation stage | 1 |
| Support base | 1 |
| Support post | 4 |
| Module piece | 1 |
| Screws and nuts | 1 set |
| Instruction manual | 1 |
Diffraction distribution of single slit
Interference of double slits
Bragg diffraction
Malus' law
