Plancks Constant Kit
Product Code : EL-AS-10841
Quick Answer: Plancks Constant Kit brings together the Planck's Constant Unit with screened lead, six colour filters, three narrow band filters and metering, giving a direct method for a reasonable order of magnitude value of Planck's constant, h.
Last updated: October 2026
Key Features
- Planck's Constant Unit with screened lead and a photo emissive caesium antimony cathode (185-650 nm)
- Colour filters set of six
- Set of 3 narrow band filters for the mercury violet, green and yellow lines
- Metering: Easy-Read Meter, 20V d.c. attachment and Spacesaver Picoammeter
- PP3 battery available separately
Technical Specifications
| Specification | Value |
|---|---|
| Cathode | Caesium antimony, photo emissive |
| Spectral response | 185-650 nm |
| Colour filters | Set of six |
| Narrow band filters | Set of 3 (mercury violet, green, yellow) |
About This Product
With each colour filter placed over the cell in turn, the backing potential difference from the internal PP3 (6F22)-type cell is adjusted until the anode current is just reduced to zero, giving V for each frequency. A plot of V against f is a reasonable straight line with gradient h/e, and the narrow band filters give a similar graph of the same gradient. Together the items form a Planck constant experiment kit that also demonstrates the photoelectric effect. The Plancks Constant Kit is available for supply within India and for export to Cyprus, Italy, France, North Macedonia and Republic of the Congo.
Frequently Asked Questions
Q1. What does the plot of V against f show?
It gives a reasonable straight line whose gradient is h/e.
Related: Atomic Structure, Plancks Constant Apparatus, UVC Lamp with Bulb.
For a quotation on the Plancks Constant Kit, contact School Equipments India.
.jpg)
 (1).png)
.jpg)
 (1).png)
.jpg)