Wave Calculator
Wavelength
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Period
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Photon Energy
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Wave Properties
v = f*lambda. Sound in air: ~343 m/s. Light in vacuum: 299,792,458 m/s.
Period T = 1/f. A 440 Hz wave has period 2.27 ms and wavelength 0.78 m in air.
For EM waves, photon energy E = hf (h = 6.626e-34 J*s). Visible light: 380-700 nm wavelength.
Frequently Asked Questions
Wave equation?
v = f*lambda. Speed = frequency x wavelength. Period T = 1/f.
Speed of sound?
In air at 20C: 343 m/s. Increases ~0.6 m/s per degree C. In water: ~1480 m/s.
Speed of light?
In vacuum: 299,792,458 m/s (exact). In glass: ~200,000,000 m/s.
Doppler effect?
Source moving toward you: frequency increases. Away: decreases. Used in radar, ultrasound.