Question R16 Q5 - NSB MS 2007

Which of the following is a MAIN advantage of a Newtonian reflector telescope over a Galilean refractor telescope:

W) the Newtonian is much smaller and resistant to changes in temperature

X) the Newtonian can be used in a wider variety of temperatures

Y) the Newtonian focuses all colors of light at the same focal point

Z) the Newtonian mirrors are usually made of metal so they cannot easily break

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