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Features
Introduction
This LEAI-52 experimental apparatus for determining Planck's constant is used to demonstrate the photoelectric effect, measure the characteristic curve of a photoelectric tube, verify the existence of "red limit" frequency, and calculate the Plancks constant according to the Einsteins equation of photoelectric effect. By adding optional modules of photocell, photoresistor and photodiode, current-voltage characteristics and other properties of these photoelectric devices can be measured. It is an ideal teaching apparatus for physics laboratories at colleges and universities.
Specifications
| Description | Specifications |
| Wavelength of filters | 365 nm, 405 nm, 436 nm, 546 nm, 577 nm |
| Light source | 50 W Mercury lamp |
|
Sensor |
Wavelength range: 340 ~ 700 nm |
| Cathode sensitivity: ≥1 µA (-2 V≤UKA≤0 V) | |
| Anode dark current: ≤5×10-12 A (-2 V≤UKA≤0 V) | |
| Current measurement range | 10-7 ~ 10-13 A, 3-1/2 digit display |
| Phototube power supply | I: -2 ~ +2 V; II: -2 ~ +20 V, 3-1/2 digit display, stability ≤0.1 % |
| Zero drift | < ±0.2% of full scale (for scale 10-13 A) within 30 minutes after warm-up |
| Measurement method | Zero current method and compensation method |
| Measurement error | 3% |
Parts List
| Description | Qty |
| Main Unit | 1 |
| Electric Control Unit | 1 |
| Cable | 2 |
| Photocell Module (size 10 mm × 10 mm, load potentiometer 10 kΩ ) |
1 each (optional) |
| Photoresistor Module (dark resistance 30 kΩ) | |
| Photoresistor Module (dark resistance 30 kΩ) | |
| Power Cord | 1 |
| Instruction Manual | 1 |
Contact Person :Mr. James
Company:Lambda Scientific Systems, Inc.
Address:16300 SW 137th Ave, Miami, Florida, USA,33177
Telephone:
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Fax:
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