IB DP Physics: Waves

Question 1

In a wave moving from right to left, establish the direction of motion of points P and Q between t >0 and t <0.25 T.

Accepted Answer

P = downwards, Q = downwards

Question 2

S is the source of a longitudinal wave. Which of the points labelled is a possible position for P after time, t.

Accepted Answer

i

Question 3

Light travels from air into water. Which quantities will be equal for the wave of light in air and water?

Accepted Answer

period

Question 4

What condition is necessary for two sources of waves to be coherent?

Accepted Answer

They have a constant phase difference.

Question 5

Monochromatic light passes through a double slit onto a screen. What would not affect the gaps between the dark fringes?

Accepted Answer

increasing the brightness of the light

Question 6

A train has a high-pitched whistle. The speed of sound in air is 340 m s−1. Which statement is correct?

Accepted Answer

The frequency of the sound wave is 3400 Hz.

Question 7

Which of the following waves cannot be polarized?

Accepted Answer

sound

Question 8

If you are sitting in a classroom with the door open, you can hear but not see what is happening around the corner. Why?

Accepted Answer

sound waves are diffracted but light waves are not

Question 9

An electromagnetic wave has 1.5 times the frequency of red light. Which part of the spectrum does it come from?

Accepted Answer

blue

Questions 9