Question

What is the ratio of wavelength of vibrations P and R ?

• A. 1:9
• B. 3:1
• C. 1:1
• D. 1:3

Answer 1

The correct option is D 1:3

The wavelength of a sinusoidal wave is the distance between consecutive corresponding points of the same phase, such as crests, troughs, or zero crossings and is a characteristic of both traveling waves and standing waves, as well as other spatial wave patterns. Wavelength is commonly designated by the Greek letter lambda ($\lambda$).
The frequency, f, of a wave is the number of waves passing a point in a certain time. We normally use a time of one second, so this gives frequency the unit Hertz (Hz), since one Hertz is equal to one wave per second.
Hence, the ratio of the wavelength of the vibrations P and R are 1:3.