Photoelectric Effect Apparatus

The Photoelectric Effect Apparatus is designed to study the photoelectric emission of electrons from a metal surface under controlled illumination. The apparatus consists of a light-tight enclosure containing a vacuum photocell connected to a control and measurement unit through shielded cables. It enables students to investigate the relationship between incident light and electron emission, verify the characteristics of a vacuum photocell, and study the effect of light intensity on photoelectric current. Manufactured by Atico Export India.

Principle

The photoelectric effect occurs when light of sufficient frequency falls on a metal surface, causing the emission of electrons. The emitted photoelectrons generate a measurable photocurrent, which depends on the intensity and frequency of the incident light. By varying the applied voltage and illumination conditions, the characteristic behavior of a vacuum photocell can be studied, and the inverse square law of light intensity can be verified.

Objectives

• Study the photoelectric emission of electrons from a metal surface.
• Obtain the characteristic curves of a vacuum photocell.
• Investigate the effect of light intensity on photoelectric current.
• Verify the inverse square law of illumination.

• Photoelectric effect experiments.
• Vacuum photocell characteristic studies.
• Light intensity and illumination experiments.
• Physics laboratory demonstrations.

Vacuum Photocell :

• Enables accurate study of electron photoemission under controlled conditions.

Light-Tight Enclosure :

• Prevents interference from external light sources for reliable measurements.

Control and Measurement Unit :

• Provides convenient operation and accurate measurement of experimental parameters.

Shielded Connections :

• Shielded cables minimize electrical noise and improve measurement accuracy.

Compact Experimental Setup :

• Designed for easy operation and effective laboratory demonstrations.