Physics Past Questions and Answers

The terrestrial telescope has one extra lens more than the astronomical telescope. The extra lens is for

The driving mirror of a car has a radius of curvature of 1m. A vehicle behind the car is 4m from the mirror. Find the image distance behind the mirror.

The pressure of a given mass of a gas changes from 200Nm<sup style='font-size: smaller;'>-2</sup> to 120Nm<sup style='font-size: smaller;'>-2</sup> while the temperature drops from 127°C to -73°C. The ratio of the final volume to the initial volume is

The thermometric substance of an absolute thermometer is

A plane sound wave of frequency 85.5Hz and velocity 342ms<sup style='font-size: smaller;'>-1</sup> is reflected from a vertical wall. At what distance from the wall does the wave have antinode?