Draw a labelled ray diagram to show the image formation in an astronomical telescope for normal adjustment position. Write down the expression for its magnifying power.

Draw a labelled ray diagram to show the image formation in an astronom

1.	Draw a labelled ray diagram to show the image formation in an astronomical telescope for normal adjustment position. Write down the expression for its magnifying power.
Answer» Solution :A RAY DIAGRAM showing the image formation in an astronomical telescope for normal ADJUSTMENT is being shown in Fig. 9.50. Magnifying POWER of telescope in normal adjustment `m=-f_(0)/f_(e)` where `f_0` = focal length of objective and `f_e` = focal length of eyepiece. The length of the telescope tube L = distance between O and E lens = `f_(0) + f_(e)`

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Draw a labelled ray diagram to show the image formation in an astronomical telescope for normal adjustment position. Write down the expression for its magnifying power.

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