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In an astronomical telescope in normal adjustment, a straight black line of length  is drawn on the objective lens. The eyepiece forms a real image of this line. The length of this image is . The magnification of the telescope is

a)

b)

c)

d)


Question ID - 152416 | Toppr Answer

In an astronomical telescope in normal adjustment, a straight black line of length  is drawn on the objective lens. The eyepiece forms a real image of this line. The length of this image is . The magnification of the telescope is

a)

b)

c)

d)

1 Answer - 5876 Votes

3537

Answer Key : (a) -

(a)

Here we treat the line on the objective as the object and the eyepiece as the lens

Hence  and

Now

Solving we get

Magnification

 Magnification of telescope in normal adjustment



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