Y12 Stationary waves

What are stationary waves also known as?

• Standing waves

• Travelling waves

• Pulsating waves

• Oscillating waves

How are stationary waves produced?

• By the superposition of two waves of the same frequency and amplitude travelling in opposite directions

• By the superposition of two waves of different frequency

• By the superposition of two waves of the same frequency and amplitude travelling in the same direction

• By the superposition of two waves of different amplitude

What produces a wave pattern where the peaks and troughs do not move?

• Diffraction of sound

• Interference of waves

• Refraction of light

• Travelling wave and its reflection

According to the principle of superposition, what is the resultant displacement when two or more waves meet?

• The vector sum of the displacements of the individual waves

• The displacement of the wave with the highest amplitude

• The displacement of the wave with the lowest frequency

• The average displacement of the individual waves

What is the frequency of the waves required to produce stationary waves?

• Different frequencies

• Slightly different frequencies

• Opposite frequencies

• The same frequency

What is the amplitude of the waves required to produce stationary waves?

• Different amplitudes

• The same amplitude

• Slightly different amplitudes

• Opposite amplitudes

Two progressive waves meet at a point. Which condition must be met for superposition of the waves to occur?

• The waves must be coherent.

• The waves must be of the same type.

• The waves must be travelling in opposite directions.

• The waves must meet in phase.

The diagram shows part of a stationary wave on a string.

X and Y are points on the string. The vibrations at X and Y are 180⁰ out of phase. What is the distance between X and Y?

• one-quarter of a wavelength

• half a wavelength

• one wavelength

• two wavelengths