-Instrument Introduction

This device is used for general physics experiments in higher education institutions. By using the deceleration field method to measure the cut-off voltage of photocathode materials under different wavelengths of monochromatic light irradiation, Einstein's equation is verified, and the experimental process of measuring Planck's constant is carried out. It helps students understand the quantum nature of light and learn experimental techniques and methods related to photoelectric effects.

-Product Features

·1. This experimental setup uses a monochromator to obtain monochromatic light. It can continuously obtain monochromatic light of different wavelengths, with more measurement data and greater accuracy.

·2. Including a monochromator device, students can gain an understanding of the working principle and debugging methods of a monochromator in an experiment, making the experimental content more diverse.

·3. The testing method adopts the zero crossing method. Compared to the introduction of human factors at turning points, using the zero crossing method is simpler and more accurate in testing.

-Experimental content

1. Measure the volt ampere characteristic curve of the photoelectric cell

2. Do itThe relationship curve of ν - U

3. Use graphical or linear fitting methods to calculate:

Planck constant h

Red limit frequency of cathode material for B phototubeν

C work function Ws

D Verify Einstein's equations

4. Measure the volt ampere characteristic curve of the photoelectric cell under positive voltage