InterviewSolution
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InterviewSolution
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A telescope consisting of an objectives of focal length`60cm`and a single -lens eyepiece of focal length`5cm` is focussed at a distant object in such a way that parallel rays emerge from the eye piece .If the object subtends an angle of `2^(@)`at the objectives ,then the angular width of the image will be - (1) `10^(@) (2) 24^(@) (3)50^(@) (4)1//6^(@)` |
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Answer» `m=(f_(0))/(f_(e))=(beta)/(alpha)` `:. beta=alpha (f_(0))/(f_(e))=2xx(60)/(5)=24^(@)` |
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