Suppose you are an artist who has been commissioned to design a memorial. What type of stone and what kind of shape will you choose to best withstand the effects of weathering? Explain your choices.

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.