How to find wavelength class 9?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
For class 9 level, wavelength is found using the basic formula λ = v/f. First, identify the wave's velocity (v) and frequency (f). For sound waves in air at room temperature, use v ≈ 340 m/s. For light waves, use v = 3 × 10⁸ m/s. Divide the velocity by the frequency to get wavelength. For example, if a sound wave has frequency 680 Hz, then λ = 340 m/s ÷ 680 Hz = 0.5 m. Remember to keep units consistent throughout your calculation.
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