Physics Past Questions and Answers

The refractive index of a material is 1.5. Calculate the critical angle at the glass-air interface

A diverging lens of focal length 30cm produces an image 20cm from the lens. Determine the object distance

Which of the following statements about the Galilean telescope is not correct?

Which of the following radiations has it's frequency lower than that of infrared radiation?

A string under tension produces a note of frequency 14Hz. Determine the frequency when the tension is quadrupled.