Plancks Constant Apparatus Manufacturer,Supplier and Exporter in India
Product Code : EL-AS-10838
Product Description
The Planck's Constant Unit can be used:
As a direct method that gives a reasonable order of magnitude value for Planck's constant, h
For the demonstration of photoelectric effect and the principle of applying a backing potential difference to reduce the anode current to zero
The unit contains a photo emissive Caesium Antimony cathode, with a spectral response of 185-650nm. When light of frequency, f, strikes the cathode, electrons of energy E=hf-W0 are released and would normally reach the anode, producing a current which can be registered on a very sensitive instrument such as a Picoammeter or an Electrometer.
This apparatus enables values of V to be found for various frequencies of light selected by placing each of the colour filters in turn over the cell.
A plot of V vs. f gives a reasonable straight line where the gradient is h/e.
The potential difference from an internal PP3 (6F22)-type cell can be adjusted to a value V where the anode current is just reduced to zero.
V is proportional to the frequency of light used.
The Planck's Constant Unit requires the following to operate:
Spacesaver Picoammeter
PP3 Battery
Easy-Read Meter
Colour Filters set of six
Set of 3 Narrow band filters
20V d.c. Attachment
All of the required equipment for Planck's Constant can also be purchased together in the Planck's Constant Kit.
Further
Information
|
Curriculum
Link |
Atomic
Physics & Radiation |
|
Product
Type |
Planck's
Constant Unit |
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Plancks Constant Apparatus Manufacturer and supplier in India
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