Planck Constant Apparatus
Product Code : JA-APE-7291
The Planck Constant Apparatus (SKU JA-APE-7291) is a ready-built circuit for measuring the photoelectric effect and determining Planck's constant. Inside the unit are a caesium antimony photocathode, a DC supply with a potentiometer giving a variable retarding voltage, and a digital display of that voltage; six coloured lenses vary the frequency of the incident light. This Planck constant apparatus for the photoelectric effect is used with a picoammeter in B.Sc, M.Sc and engineering physics practicals.
Specifications
The apparatus contains a caesium antimony cathode, a DC power supply with potentiometer for a variable retarding voltage and a digital retarding-voltage display, with six coloured lenses and a 4 mm to UHF lead for the picoammeter.
| Product | Planck Constant Apparatus |
| SKU | JA-APE-7291 |
| Function | Ready-built circuit for measuring the photoelectric effect |
| Cathode | Caesium antimony |
| Retarding voltage | Internal DC supply with potentiometer, variable |
| Display | Digital display of the retarding voltage |
| Frequency selection | 6 different coloured lenses |
| Lead included | 4 mm to UHF lead for connecting a picoammeter |
| Current measurement | Used with a picoammeter |
Applications of the Planck constant apparatus
For each coloured lens the retarding voltage is increased until the photocurrent on the picoammeter falls to zero; plotting this stopping voltage against light frequency gives a straight line whose slope yields Planck's constant.
- Determining Planck's constant from stopping voltage against frequency
- Studying the photoelectric effect and threshold frequency
- Finding the work function of the caesium antimony cathode
- Showing that stopping voltage depends on frequency, not intensity
- B.Sc, M.Sc and engineering physics modern physics practicals
Scope of supply
The listing covers the Planck constant apparatus with its internal supply and display, six coloured lenses and a 4 mm to UHF lead. The picoammeter is a separate item. Accessories, spares and quantities are confirmed on the quotation.
Packing, MOQ and lead time
Minimum order quantity, lead time and packing are confirmed on each quotation according to the quantity and the delivery destination. JaincoLab supplies colleges and universities, education-project orders and export consignments to buyers in Africa, the Middle East and South and South-East Asia.
Frequently asked questions
How does the apparatus vary the light frequency?
Six different coloured lenses are provided to change the frequency of the light falling on the cathode.
What else is needed?
A picoammeter to measure the photocurrent; a 4 mm to UHF lead for connecting it is included.
What is inside the unit?
A caesium antimony cathode, a DC supply with potentiometer for the retarding voltage and a digital voltage display.
What should a quotation request include?
Send the SKU JA-APE-7291, the quantity, whether a picoammeter is needed, and the delivery destination.
Related products
- Planck Constant Determination Box
- Planck's Constant By LED
- Franck-Hertz Experiment with Neon
- Digital Voltmeter/Ammeter With Shunts
See the Atomic Physics Equipment range from JaincoLab, a physics lab equipment manufacturer in India.
Request a quote
To order the Planck Constant Apparatus, send the quantity and delivery destination through the JaincoLab contact page or email [email protected].
