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 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 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 microscope consists of an objective of focal length $1.9cm$ and eye piece of focal length $5cm$. The two lenses are kept at a distance of $10.5cm$. If the image is to be formed at the least distance of distinct vision, the distance at which the object is to be placed before the objective is:
(Least distance of distinct vision is 25 cm)