Suppose that a heavy and light-weight satellite are put into low orbits around the Earth. Could you tell, by observing the shape or speed of the two orbits, which satellite was the heavy one?

In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.