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Ronnie67

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Everything posted by Ronnie67

  1. Cheers Bob for the help, will give it a go tomorrow, its a bit late to try now, just finished work so brain power is down lol Ronnie
  2. Hi guys I just wanted to pick your brains sort of speak, it would be most appreciated if you could help. here are the questions. a) The luminosity of the Sun is 4*10^33 erg/s, and its radius is 7*10^10 cm. You are tasked with building a solar power plant in the Arizona desert, using solar panels with 10% efficiency. How large an area (km^2) must your solar panels cover to match the power output of a large nuclear powerplant (about a GigaWatt)? Please enter your answer in units of km^2 The Keck telescope on Mauna Kea has an angular resolution on Earth of half an arcsecond. How far away (in meters) could you read ("resolve the letters of") a book with 3 mm square type, using the Keck telescope on Earth? c) In space, the angular resolution of the Keck telescope is govererned by the diffraction limit. How far away could you read the same book, using the Keck telescope in space? Please express your answers in units of meters. These questions are from a free astronomy topic from coursera, anyone can join for free, its fun but some of the questions have placed me in a stump, I cannot move forward until I complete these three. Ronnie
  3. what a pity, would have loved to have seen that
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