MCQ
In a compound microscope, maximum magnification is obtained when the final image
- Acoincides with the objective
- Bis formed at the least distance of distinct vision
- Ccoincides with the object
- Dis formed at infinity
✓
Answer
(b) is formed at the least distance of distinct vision
Explanation: Magnification of compound microscope is given by
$m =\left(\frac{v_o}{u_o}\right)\left(1+\frac{D}{t_o}\right)$ when final image is formed at near point
Whereas, $m =\left(\frac{ v _o}{ u _o}\right)\left(\frac{D}{f_e}\right)$, when final image is formed at infinity.
Hence, magnification is maximum when final image is formed at near point (least distance of distinct vision).
Explanation: Magnification of compound microscope is given by
$m =\left(\frac{v_o}{u_o}\right)\left(1+\frac{D}{t_o}\right)$ when final image is formed at near point
Whereas, $m =\left(\frac{ v _o}{ u _o}\right)\left(\frac{D}{f_e}\right)$, when final image is formed at infinity.
Hence, magnification is maximum when final image is formed at near point (least distance of distinct vision).
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