The required concepts to solve this question are angular magnifiction and distnce between object and eyepiece.
Firstly, write the equation for distance. Rearrange the equation for focal length of object and calculate the angular magnification of the telescope.
The expression for angular magnification is,
Here, is the focal length of the eyepiece and is the focal length of the object.
The expression for distance between object and eyepiece is,
Distance between object and eyepiece is .
The expression for total distance is,
Substitute for and for in above equation.
The expression for angular magnification is,
Substitute for and for in above equation.
Ans:
The angular magnification of the telescope is .
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