KERR EFFECT EXPERIMENT
Item Code : SK019
Principle and Working:
Certain materials become doubly refractive under the influence of a strong electric field. This phenomenon, known as the Kerr effect, can be observed in this experiment using a nitrobenzene solution. In Kerr Effect setup, a small glass container, mounted with a plate capacitor, is filled with liquid. The container is placed between two filters positioned at 90° to each other. Initially, the field of view on the screen appears dark. However, when an electric field is applied, the field of view brightens because the light beam becomes elliptically polarized as it passes through the birefringent liquid.
- All electrical connections are made using 4mm safety sockets and plugs
- Saddle can hold rod from 8 to 15mm.
- Heavy, rigid and stable Optical bench.
- Height and level adjustment screws
- Analyser/Polayser with 0 ± 90° graduation.
- Electrode with 4mm safety socket (for 6 kV).
- High voltage DC power supply with thermal safety switch.
- To demonstrate the kerr effect in nitrobenzene solution
- To observe brightness on detector depending on voltage applied.
- To determine half wave voltage for blue light.
- To determine kerr constant
- Halogen lamp : 12 V, 35 W, horizontal filament.
- Kerr Cell : Glass, Dimensions 50x50x20 mm.
- Electrode : MS material, 1mm gap.
- Optical bench : Length – 1 mtr. with Scale, 4 point levelling. Material Aluminium or MS.
- Transversel slider : 25 – 0 – 25mm, LC 0.01mm.
- Polarizer : Angle (0 + 90°), LC 1°, Aperture 21mm, Frame 130mm, Rod 10 mm.
- Colour filter : Blue 465 – 475 nm, Dia. 25-30mm.
- Fixed slider : Base width 50mm, H 115mm.
- Power supply : Output 2,3,4,5,6,8,10,12,14V, DC is full wave rectified, unsmoothed & unregulated, thermal reset switch.
- HV Power supply : 0-6 kV DC (50μA & 2mA), 6.3V AC/2Amp Display 3 ½ digit LED.
| S.No. | Item Name | SK019 |
|---|---|---|
| 1 | Transverse Slider | 1 |
| 2 | Fixed Slider | 4 |
| 3 | Fixed Slider (Large) | 1 |
| 4 | Optical Bench with Levelling | 1 |
| 5 | Electrode and Stand for Kerr Cell | 1 |
| 6 | Kerr Cell (imported) | 1 |
| 7 | Filter Holder | 1 |
| 8 | Wooden Box for Kerr Cell | 1 |
| 9 | Object Screen 15x15cm | 1 |
| 10 | Filter Blue | 1 |
| 11 | Power Supply 0-6KV | 1 |
| 12 | Power Supply 2-14V | 1 |
| 13 | Power Cord (Main Lead) | 2 |
| 14 | Digital Multimeter 4½ Digits | 1 |
| 15 | Convex Lens in Holder (FL 100mm) | 1 |
| 16 | Polarizer/Analyser | 1 |
| 17 | Pin Hole Photo Detector | 1 |
| 18 | Flexible Plug Lead 100cm (Black) | 2 |
| 19 | Flexible Plug Lead 100cm (Red) | 2 |
| 20 | Flexible Plug Lead 100cm (Yellow) | 2 |
| 21 | Light Source Halogen Mounted on Rod 10cm | 1 |
Note : The standard supply is the Hexagonal Optical Bench (MS). To request the Triangle Optical Bench (Aluminium Extrusion), please specify in your request.
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