4.2 Travelling Waves

Which of the following best describes the relationship between wave speed (v), frequency (f), and wavelength (λ)?

A. v = f x λ

B. v = f + λ

C. v = f/λ

D. v = f - λ

Which type of wave causes particles of the medium to vibrate perpendicular to the direction of wave propagation?

A. Longitudinal waves

B. Transverse waves

C. Both A and B

D. Neither A nor B

Sound waves are an example of:

A. Transverse waves

B. Longitudinal waves

C. Electromagnetic waves

D. Surface waves

Using Huygens' principle, which of the following best describes the propagation of wavefronts?

A. Each point on a wavefront acts as a source of secondary wavelets.

B. Wavefronts always propagate in a straight line.

C. Wavefronts can only propagate in a vacuum.

D. Wavefronts are always circular in shape.

If the frequency of a wave doubles while its speed remains constant, what happens to its wavelength?

A. It remains the same.

B. It doubles.

C. It is halved.

D. It becomes four times.

a) A wave travels with a speed of 300 m/s and has a frequency of 500 Hz. Calculate its wavelength. [2]

b) Differentiate between transverse and longitudinal waves, providing one example for each. [3]

a) Describe Huygens' principle and its significance in understanding wave propagation. [3]

b) A wavefront approaches a barrier with two small slits. After passing through the slits, what pattern is observed on a screen placed behind the barrier? [2]

a) A tuning fork produces a sound wave with a frequency of 440 Hz. If the speed of sound in air is 340 m/s, determine the wavelength of the sound produced. [2]

b) What is the difference between wave speed and frequency when describing a wave? [3]

a) A wave on a string has a frequency of 5 Hz and a wavelength of 0.4 m. Calculate the speed of the wave. [2]

b) Explain the relationship between wave speed, frequency, and wavelength. [3]

c) If the frequency of the wave is doubled, what will be its new wavelength? [2]

a) Describe the difference between a wavefront and a ray when discussing wave propagation. [3]

b) Using Huygens' principle, explain how a straight wavefront can bend around an obstacle. [3]

c) What pattern is observed when a wavefront encounters a barrier with a single slit? [2]