List of top Physics Questions on Optical Instruments asked in MET

A man who wears glasses of power \(3D\) must hold a newspaper at least \(25\,cm\) away to see clearly. How far away would the newspaper have to be if he took off the glasses and still wanted clear vision?

The magnifying power of a telescope is \(m\). If the focal length of the eye piece is doubled, then its magnifying power becomes:

A man at a distance \(11\,km\) from two pillars wants to see them separately. What will be the approximate distance between the pillars?

Radius of orbit of satellite of earth is \(R\). Its kinetic energy is proportional to

While viewing a distant object with a telescope suddenly a housefly sits on objective lens. The correct statement is that

0.5 mole of each of $H_{2}$, $SO_{2}$ and $CH_{4}$ are kept in a container. A hole was made in the container. After 3 h, the order of partial pressures in the container will be

The magnifying power of a telescope is 9. When it is adjusted for parallel rays, the distance between the objective and eye-piece is 20 cm. The focal length of objective and eye-piece are: