Use a lux meter to measure light intensity at different distances from a light source and verify the inverse square law. Analyze how distance affects light intensity.
If light intensity is measured at increasing distances from a source, then it will decrease proportionally to the inverse square of the distance.
As an Amazon Associate, this site earns from qualifying purchases.
Set up the light source in a dark room.
Measure a specific starting distance from the light source using the measuring tape.
Place the lux meter at this distance and record the light intensity reading.
Move the lux meter to a new distance, increasing by a set increment.
Record the light intensity at each distance.
Repeat measurements for accuracy.
Plot the results on a graph with distance on the x-axis and intensity on the y-axis.
Analyze the graph to see if it follows the inverse square law.
Discuss any deviations observed and potential reasons.
Conclude how well the inverse square law applies to your data.
Prepare a report detailing your findings.
Present your experiment and results.
The light intensity readings should decrease as the distance increases, following the inverse square law, represented by a curve on the graph.
Distance from light source
Light intensity
Light source type, Room conditions, Measurement increments
Ensure electrical safety when using the light source. Avoid looking directly into bright lights.
Use clear charts to illustrate the inverse square relationship.
Explain the mathematical basis of the inverse square law.
Discuss real-world applications of the law.
It states that intensity is inversely proportional to the square of the distance from the source.
To minimize interference from other light sources and ensure accurate measurements.
Repeat measurements and ensure the lux meter is properly calibrated.
