The length of telescope is 100cm and magnification is 9 the focal length of objective and eyepiece is ? answer is 90cmamd 10cm but how?

1 Answer
chandramohanPanakkal ยท Stefan V.
Jul 16, 2018

The magnification is the FL of the objective divided by the FL of the eyepiece,

Explanation:

"magnification" = "FL of objective"/"FL of eyepiece"

So

"90 cm"/"10 cm" = 9 = "magnification"

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