List of top Physics Questions on Optical Instruments asked in COMEDK UGET

The distance between the objective and eyepiece of an astronomical telescope in normal adjustment is $27\text{ cm}$ and its magnifying power is $8$. What is the focal length of the eyepiece?

In the normal adjustment of an astronomical telescope, the objective and eyepiece are 36 cm apart. If the magnifying power of the telescope is 8, find the focal lengths of the objective and eyepiece.

The focal lengths of the objective and eyepiece of a compound microscope are \( 1 \, \text{cm} \) and \( 10 \, \text{cm} \) respectively. Length of the tube is \( 25 \, \text{cm} \). If the final image is formed at infinity, the magnifying power of the microscope is: