Physics Past Questions and Answers

Which of the following relations about the focal length f_o of the objective and focal length f_e of the eye piece of a compound is correct?

The functional difference between a lens and a mirror is that a lens

The diagram above illustrates an electromagnetic wave travelling with speed 3.0 x 10⁸ms^-1. Calculate the wave length of the wave

A fish inside a pond appears to be at a depth of 1.5m when viewed vertically from above. The refractive index of the water in the pound is 1.3. Calculate the apparent displacement of the fish

an observer hears an echo 1.26 seconds after blowing a whistle near a cliff. calculate the distance of the observer from the cliff. [speed of sound in air = 330ms^-1]