LADP-16 Photoelectric Effect(Planck) Experiment

Photoelectric Effect(Planck) Experiment 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 apparently better than filters. 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