What formula is used to calculate wavelength?

• A. W = f × λ
• B. λ = c / f
• C. λ = f / c
• D. W = f + c

Answer: (B)

The formula used to calculate wavelength is correctly identified as λ = c / f. In this equation, λ (lambda) represents the wavelength, c is the speed of sound in air (or another medium), and f is the frequency of the sound wave. This relationship shows that wavelength is inversely related to frequency; as frequency increases, the wavelength decreases, assuming the speed of sound remains constant.

This formula provides a direct way to determine the wavelength based on the frequency of the sound wave and the speed at which it travels through the medium. If you know the speed of sound (around 343 meters per second in air at room temperature) and the frequency of a wave, you can use this formula to calculate the wavelength, which is essential for understanding how sound waves behave in different contexts.

The other options do not correctly represent the relationship between wavelength, frequency, and speed of sound, hence they do not fulfill the requirement for calculating wavelength accurately.