5435 - Photoelectric effect - Planck's Constant
By buying you get
373 Points
More than a purchase. You get service and expert advice. Ask which products and combinations are recommended for you.
Thanks to this apparatus you are allowed to study photoeletric effect, this instrument is a good starting point to study quantum mechanics. It is basically composed of two parts: a phototube and a control unit (in which is built-in a voltmeter and a nanoammeter). Three LEDs, with wavelength known, are supplied: they are used as monochromatic light sources. The light intensity could be varied from 0 to 100%.
The photoelectric effect or photoemission is the production of electrons or other free carriers when light is shone onto a material.
You will be able to check the relation between the energy of the emitted electrons and the wavelength of the incident radiation: you will be able to calculate which is the value of the Planck constant using Einstein notion regarding photoelectric effect.
The photoelectric effect or photoemission is the production of electrons or other free carriers when light is shone onto a material.
You will be able to check the relation between the energy of the emitted electrons and the wavelength of the incident radiation: you will be able to calculate which is the value of the Planck constant using Einstein notion regarding photoelectric effect.
Technical data
- Power supply: 24V DC
- Voltmeter 4 digits, sensibility < 2mV
- Ammeter 4 digits, sensibility < 5nA
- Button to cut off current
- LED light adjustment 0-100%
- Anodic tension adjustment
- Three LEDs (red, green, blu)
Dimensions and weight:
- Control station 19x13,5x6cm weight 370g
- Phototube base 13x18x15,5cm weight 560g
Topics
- How to use it
- Historical notes on the nature of light
- Electromagnetic waves
- Intensity of electromagnetic waves
- Photoelectric effect
- Photoelectric cell
- Work function
- Threshold frequency
- Characteristic graphic of a photocell
- Stopping potential
- Kinetic energy of electrons doesn't depend on radiation intensity
- The number of emitted electrons depends on radiation intensity
- Summary
- Einstein quantum theory
- How Einstein quantum theory explains events
- How to value threshold frequency
- How to measure Planck constant
- Quantitative unit
- ks
5435 - Photoelectric effect - Planck's Constant
