Answers

2014-10-06T18:29:15+05:30
Galileo used was a crude refracting telescope.It had a convex objective lens.It also had a concave eyepiece in a long tube.The lens were used to bend or refract the light.
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2014-10-06T18:30:19+05:30
Its concave lense which is used by galelio in telescope
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