81 - Light Intensity

In this experiment, you will use a light intensity sensor to determine the distance and angular dependence of the emitted light of several light sources of your choice.

Requirements:

• Light intensity sensor. Ideally, you have an Android-Device, where you can use the “Light” sensor in the "Phyphox"-App. For iPhone-users: There are some Apps to measure the light intensity. Some of them don't seem to work properly, so if you cannot get hold of an Android phone, make sure that you can record reasonable data! Otherwise, you cannot perform this experiment.
• Computer
• Different light sources (lamp, light bulb, flashlight, projector, candle, bicycle lights, ...)
• Distance measuring device (ideally a ruler >30cm, but you can also use an arbitrary object as "lenght unit")