An ordinary light bulb is a delicate physical object with nothing particularly striking about it by itself.
When we put electrical energy into it… almost magically light is created. A rainbow of colors is possible in varying degrees of brightness. Together, the bulb and the energy became ... Views: 886
Imagine I am the speaker before a large audience. I ask for a volunteer from the audience to come alongside me and help with a demonstration. I suggest that some people present may already be familiar with what I am about to demonstrate and that those for whom my exercise is new should know that ... Views: 2019