How can light intensity be measured?

Answered on : 2024-01-24

Sources

How to Measure Light Intensity: Understanding & Using a Lux ...

bioslighting.com

How to Measure Light Intensity (with Pictures)

wikihow.com

How to measure light | Using your light meter correctly

atp-instrumentation.co.uk

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1. **Light Meter:** Professionals use a light meter (or lux meter) with a sensor to measure illuminance, providing a quantifiable reading of light in a space or on a surface[1].

2. **Digital Photometer or App:** Handheld digital photometers or smartphone apps can also measure light intensity. Place the photometer in the desired area for measurement[2].

3. **Lux and Lumens:** Light intensity is often expressed in lux or lumens. Lux measures light falling on a surface, while lumens quantify the light emitted from a source[4][6].

4. **Science with Smartphone:** Lux is a unit of measurement for light, and smartphones can be used to measure light using lux[5].

5. **Physics Terminology:** In physics, light intensity or luminous intensity is the amount of light falling on a surface across a certain square foot[7].

6. **Additional Terminology:** Light intensity can also be expressed as radiant intensity (measured in watts per steradian) or luminous intensity (measured in lumens)[8].