Physics Past Questions and Answers

The basic difference between a transverse wave and a longitudinal wave travelling in the same direction in a medium is in the

A Amplitude of the wave
B Wavelength of the wave
C Direction of vibration of the particles of the medium
D Period of vibration of the particle of the medium

Question 3172:

A wave travelling from water to glass suffers a change in its speed at the common boundary. Which of the following properties explains this observation?

A Dispersion
B Refraction
C Interference
D Diffraction

Question 3173:

The image of an optical pin placed at the principal focus of a concave mirror will be formed

A Between the principal focus and the pole
B At the centre of the curvature
C Between the principal focus and the centre of curvature
D At infinity

Question 3174:

A man 1.8m tall stands 3m away from a pin hole camera. If the distance between the pin hole and the screen of the camera is 0.3m. Calculate the height of the image of the man produced by the camera

A 0.18m
B 0.50m
C 1.62m
D 18.00m

Question 3175:

During a thunderstorm, lightning and thunder occurred simultaneously in the atmosphere. An observer on the earth surface's sees the lightning flash shortly before hearing the thunder. This is because the

A Atmospheric pressure is higher at the surface than at the higher altitudes
B Speed of sound is less than that of light
C Temperature of the atmosphere decreases with altitude
D Atmospheric density decreases with altitude