White surfaces reflect light differently than dark surfaces. We can measure this with a simple experiment. For this we use a light meter. Actually, all smartphones also have a light meter. However, this can only be read on Android smartphones (e.g. with the free PhyPhox app).
Material:
- Light Meter
- Black Paper
- White Paper
- Sunlight or Infrared Lamp
- Turn on the light meter and remove the cover from the sensor.
The sensor is under the white plastic dome.
- To take a measurement, rotate the white dome toward the surface. Wait a moment and then press the “Hold” button.
- Now you can turn the device over again and read the value.
- For a new measurement, press the “Hold” button again to release the lock.
