Physics Past Questions and Answers

In a ray diagram for a thin converging lens, a ray that is not parallel to the optic axis but passes through the optic center will

Which of the following correctly, describes the image of an object, 4cm from a diverging lens of focal length 12cm?

Two tuning forks of frequency 256Hz and 260Hz are sounded close to each other. What is the frequency of the beats produced?

A man hears his echo from a nearby hill 2s after he shouted. If the frequency of his voice is 260Hz and the wavelength is 1.29m, how far away is the hill?

When the bottom tip of a vibrating tuning fork is held in contact with a wooden box, a louder sound is heard. This phenomenon is known as