How to calculate wavelength?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
To calculate wavelength, use the formula λ = v/f, where λ (lambda) is wavelength, v is wave velocity, and f is frequency. For electromagnetic waves in vacuum, use λ = c/f, where c = 3 × 10⁸ m/s (speed of light). For example, if a wave has a frequency of 100 Hz and travels at 340 m/s (speed of sound), the wavelength is λ = 340/100 = 3.4 meters. You can also calculate wavelength from energy using λ = hc/E, where h is Planck's constant and E is photon energy.
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