Uploaded December 2024 | Updated September 2026, 1 hour ago

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Holmarc's Photo Electric Apparatus (Model No: HO-ED-EM-02) is an instrument for studying the Photo Electric Effect and to obtain the Planck's constant.

The apparatus is designed with a Halogen Lamp, photo tube and a filter wheel arranged on a rail based platform. The filter wheel includes five narrow band interference filters to get the precise wavelength. A vacuum photo tube is kept inside the tube housing. This tube has very low anode dark current to achieve better results. The microprocessor controlled electronic interface gives the current and voltage readouts. The regulated power supply has 0 - 2V variable voltage to provide the stopping potential for electrodes. The ammeter gives accurate current output measurement facility.

Read more at holmarc.com/photo_electric_effect.php

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