Engineering & Physics CalcyZone Calculator
Wave Speed Calculator (v = fλ)
Solve the wave equation for speed, frequency or wavelength.
Solved speed
343.2 m/s
Period
0.0023 s
Step-by-step working
- v = f λ
- v = 440 × 0.78 = 343.2 m/s
Mathematical Formula
v = f λ; period T = 1/f.
Overview & Explanation
For any periodic wave, speed equals frequency times wavelength.
How It Works
- Pick the unknown.
- Rearrange v = fλ.
Practical Applications
- Sound and radio wavelengths.
- Physics homework.
Example 1: wavelength of 440 Hz in air
Speed 343 m/s.
1
Inputs
Solve for: Wavelength λ · Frequency (Hz): 440 · Speed (m/s): 343
= entered
2
Step 1
v = f λ
3
Step 2
λ = 343 / 440 = 0.7795 m
4
Solved wavelength
Result
= 0.7795 m
Example 2: FM radio 100 MHz
λ ≈ 3 m.
1
Inputs
Solve for: Wavelength λ · Frequency (Hz): 100000000 · Speed (m/s): 299792458
= entered
2
Step 1
v = f λ
3
Step 2
λ = 299792458 / 100000000 = 2.9979 m
4
Solved wavelength
Result
= 2.9979 m
Frequently Asked Questions
Speed of sound?
≈ 343 m/s in air at 20 °C.
Speed of light?
299,792,458 m/s exactly.
Does frequency change between media?
No, speed and wavelength change.
Related Calculators
engineering
Ohm's Law and Power Calculator
Calculate voltage, current, resistance, and electrical power with instant unit conversions.
Use Calculator
engineering
Wavelength Calculator
Calculate distance between wave crests (λ = v / f).
Use Calculator
engineering
Doppler Effect Calculator (Sound)
Calculate the observed frequency when a sound source or observer moves.
Use Calculator
engineering
Frequency to Period Converter
Convert frequency in Hertz to period in seconds.
Use Calculator