Explain how standing waves are produced. (Select all that apply.)

Group of answer choices

Standing waves only occur in sound waves.

The waves must have the same amplitude, but can have different frequencies and wavelengths.

The wave is confined within boundaries.

The waves must have the same frequency, amplitude and wavelength.

The waves must have the same speed, though the frequencies and wavelengths of each may be different.

Standing waves only occur in waves traveling along strings.

The waves must have the same frequency and wavelength, but can have different amplitudes.

Waves traveling in opposite directions continuously interfere with each other.

Waves traveling in the same direction continuously interfere with each other.