A compound microscope has an objective of focal length 4mm and an eyepiece of focal length $25$ mm. The objective produces a real image at a distance of $180$ mm. If the eye-piece is in normal adjustment, then the magnification is

Q. A microscope consists of an objective with a focal length $2$ mm and an eye piece with a focal length $40$ mm. The distance between the foci(which are between the lenses) of objective and eyepiece is $18$cm. The total magnification of the microscope is(Consider normal adjustment and take $D=25$cm)

Q. A microscope consists of an objective with a focal length 2 mm and an eye piece with a focal length 40mm. The distance between the foci (which are between the lenses) of objective and eyepiece is 18 cm. The total magnification of the microscope is (Consider normal adjustment and take D $=$ 25 cm)

Q. A compound microscope has an objective of focal length 0.5 cm and a tube length of 15 cm. If it produces an angular magnification of 225 in normal adjustment, find the focal length of the eyepiece.

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 microscope has an objective of focal length $1.5$ cm and an eyepiece of focal length $2.5cm$. If the distance between objective and eyepiece is $20.5cm$, what is the magnification produced when the final image is at infinite distance away?