With the recent devastating earthquakes in Nepal, the goal of one of the teen student has become to invent cleaning robot. He was finally able ti run his cleaning robot. It runs from solar energy. it has a big solar panels on top of it. Solar cells convert the sun’s energy into electricity. Whether they’re adorning your calculator or orbiting our planet on satellites, they rely on the the photoelectric effect: the ability of matter to emit electrons when a light is shone on it.
