LADP-16 Apparatus for Determining Planck’s Constant – Advanced Model

Short Description:

This is a new design higher level photoelectric effect principle planck's constant instrument, it adopts a 1200/mm grating monochromator to generate single color light, which is appearently better than filters.

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Product Detail

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Planck’s Constant Experimental System applies the photoelectric effect to measure the current-voltage (I-V) characteristic curves of a photocathode against monochromatic light at different frequencies.

Experiment Examples

1. Measure I-V characteristic curve of a photoelectric tube

2. Plot U- curves

3. Calculate the follows:

a) Planck’s constant h

b) Cut-off frequency ν of cathode material of a photoelectric tube

c) Work function Ws

d) Verify Einstein’s equation

Specifications

Description	Specifications
Light Source	Tungsten-halogen lamp: 12V/75W
Spectral Range	350~2500nm
Grating monochromator
Wavelength range	200 ~ 800nm
Focal length	100mm
Relative aperture	D/f = 1/5
Grating	1200l/mm (blazed@500nm)
Wavelength accuracy	±3nm
Wavelength repeatability	±1nm
Photoelectric Tube
Working voltage	-2~ 40V continuously adjustable, 3-1/2 digital display
Spectral range	190~700nm
Peak wavelength	400±20nm