C. Wave behaviour: 255 IB Physics HL practice questions

A fire engine with its siren sounding approaches and passes a stationary observer. The frequency of the sound emitted by the siren is $f_s$. The frequency of the sound measured by the observer is $f_o$. Which of the following describes the relationship between $f_o$ and $f_s$?

A longitudinal wave moves through a medium. Relative to the direction of energy transfer through the medium, what are the displacement of the medium and the direction of propagation of the wave?

A system that is subject to a restoring force oscillates about an equilibrium position. For the motion to be simple harmonic, the restoring force must be proportional to

The intensity of a wave can be defined as the energy per unit area per unit time. What is the unit of intensity expressed in fundamental SI units?

A transverse travelling wave has an amplitude $x_0$ and wavelength $\lambda$. What is the minimum distance between a crest and a trough measured in the direction of energy propagation?

The equation for the velocity of an object performing simple harmonic motion is $v = v_0 \sin \omega t$. Which of the following is a correct alternative form of the equation?

Which of the following is a value of wavelength that is found in the visible region of the electromagnetic spectrum?[1]

A wave is polarized. What must be correct about the wave?[1]

The phenomenon of diffraction is associated with

Which of the following gives regions of the electromagnetic spectrum in the order of decreasing frequency?

A particle moving in a circle completes 5 revolutions in 3 s. What is the frequency?

Radio waves are emitted spherically from a source. At a distance $d$ from the source the amplitude of the waves is $X$.

What is the amplitude at a distance $2d$ from the source?

The rms voltage of a sinusoidal electricity supply is 110 V. The maximum potential difference during one cycle is

Progressive (travelling) waves $S$ and $T$ have the same frequency and are in the same medium. $S$ has amplitude 2.0 m and $T$ has amplitude 4.0 m. What is the ratio of the intensity of $T$ to the intensity of $S$?

A parallel beam of light with a wavelength 600 nm passes through a single narrow slit and forms a diffraction pattern on a screen. The angle at which the first diffraction minimum is formed is $2.0 \times 10^{-3}$ rad.

What would be the angle of the first diffraction minimum for light of wavelength 400 nm?