Determining the Velocity of Light Using a Periodical Light Signal at a Short Measuring Distance

The Determining the Velocity of Light Using a Periodical Light Signal at a Short Measuring Distance apparatus is designed to determine the speed of light in air by measuring the apparent transit time of a light signal over a known distance. The experiment uses a light transmitter and receiver along with an oscilloscope to accurately measure the propagation time of the light pulse. By varying the measuring distance and recording the corresponding transit time, students can experimentally determine the velocity of light and understand the principles of time-of-flight measurement. Manufactured by Atico Export India.

Principle

The experiment is based on measuring the apparent transit time of a light pulse traveling through air over a known distance. A light transmitter emits a pulse that is received by the light receiver after traveling the specified path. The transit time is measured using an oscilloscope, and by comparing the measured time with the corresponding travel distance, the velocity of light in air can be calculated.

Objectives

• Determine the velocity of light in air.
• Measure the apparent transit time of a light pulse.
• Study the relationship between travel distance and transit time.
• Understand the time-of-flight method for measuring the speed of light.
• Compare experimental results with the theoretical value of the speed of light.

System Components

Light Transmitter and Receiver :

• Quantity: 1

Two-Channel Analog Oscilloscope :

• Bandwidth: 30 MHz
• Quantity: 1

Lens in Frame :

• Focal Length: 150 mm
• Quantity: 1

Saddle Base :

• Quantity: 2

Metal Rule :

• Length: 1 m
• Quantity: 1

Light Transmitter and Receiver :

• Provides accurate transmission and detection of light pulses.

Transit Time Measurement :

• Enables precise measurement of light propagation time.

Oscilloscope Observation :

• Displays transmitted and received signals for accurate time measurement.

Adjustable Measurement Distance :

• Supports measurements at different distances for improved accuracy.

Educational Design :

• Ideal for studying optical signal propagation and time-of-flight measurement techniques.