A compound microscope has an eye piece of focal length $10cm$ and an objective of focal length $4cm$. Calculate the magnification, if an object is kept at a distance of $5cm$ from the objective so that final image is formed at the least distance vision $\left(20cm\right)$.

Q. A compound microscope has an eye piece of focal length $10cm$ and an objective of focal length $4cm$. Calculate the magnification, if an object is kept at a distance of $5cm$ from the objective so that final image is formed at the least distance vision $\left(20cm\right)$.

Q. A compound microscope has an eye piece of focal length $10cm$ and an objective of focal length $4cm$. If an object is kept at a distance of $5cm$ from the objective, so that the final image is formed at the least distance of distinct vision $20cm$, calculate the magnification.

Q. A compound microscope has an objective lens of $1.0cm$ focal length and an eye-piece of $2.5cm$ of focal length. When the object is placed at $1.1cm$ from the objective, the final image is at the least distance of direct vision. Thus, the magnification produced is

Q. A compound microscope has an objective of focal length 2 cm and an eye-piece of focal length 6.25 cm,which are separated by 15 cm.If the final image is formed at the least distance of distinct vision 25 cm, distance to the object from the objective is

Q. A compound microscope has a magnifying power $48$. The focal length of its eye-piece is $5cm$. If final image is formed at least distance of distinct vision $\left(25cm\right)$ then magnification of objective lens is