A simple telescope, consisting of an objective of focal length $$60$$ cm and a single eye lens of focal length $$5$$ cm is focussed on a distant object is such a way that parallel rays comes out from the eye lens. If the object subtends an angle $$2$$° at the objective, the angular width of the image

Question

Infinity Learn · Accepted Answer

since  $$m=fofeAlso$$  $$m=angle$$  subtended by the  imageangle  subtended  by the  object∴$$fofe=$$αβ⇒$$a=fo$$×β$$fe=60$$×$$25=24o$$

A simple telescope, consisting of an objective of focal length 60 cm and a single eye lens of focal length 5 cm is focussed on a distant object is such a way that parallel rays comes out from the eye lens. If the object subtends an angle 2° at the objective, the angular width of the image

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