Wavelength Calculator

Wavelength, Photon & Wave Physics Calculator

Compute electromagnetic wavelengths in arbitrary media, size resonant RF antennas, and solve de Broglie quantum matter waves

Primary Input Parameter

Propagation Medium (Refractive Index n)

Custom Refractive Index (n)

Wave Frequency (f)

Vacuum Wavelength (λ₀)

Photon Energy (E)

Wavelength in Medium (λ_m = c / n·f)

555.17 nm

Visible Spectrum (Green • 555 nm)

Vacuum Wavelength: 555.17 nm • Phase Speed: 299,792 km/s

Cyclic Frequency (f) 540.00 THz Period T: 1.852 fs

Quantum Photon Energy 2.233 eV 3.578 × 10⁻¹⁹ Joules

Spectroscopy Wavenumber (ν̃ = 1/λ) 18,012 cm⁻¹ 1.801 × 10⁶ m⁻¹ spatial cycles

Angular Wave Number (k = 2π/λ_m) 1.132 × 10⁷ rad/m Phase progression in medium

Operating Center Frequency

Common Band Preset

Coaxial Velocity Factor (VF)

Dipole End-Effect Factor (k)

Half-Wave (λ/2) Dipole Resonant Length

97.5 cm (38.4 in)

Two quarter-wave legs: 48.8 cm (19.2 in) each

Free-Space Wavelength (λ₀) 2.053 m 6.737 ft (80.84 inches)

Quarter-Wave Whip (λ/4 Monopole) 48.77 cm 19.20 inches radiator element

5/8-Wave Collinear Element (⅝λ) 1.219 m High-gain omnidirectional whip

Coaxial Cable Wavelength (λ_line) 1.355 m VF = 0.66 (Shortened inside cable)

Particle Entity

Kinematic Input Mode

Custom Mass (kg)

Accelerating Potential (Volts / V) 200 kV Transmission Electron Microscope (TEM)

Relativistic de Broglie Wavelength (λ = h / p)

2.508 pm (0.0251 Å)

0.002508 nm • Resolves atomic lattices (< 1 Ångstrom)

Relativistic Velocity (v / c) 0.6953 c 208,448 km/s (Lorentz γ = 1.391)

Relativistic Linear Momentum (p) 2.642 × 10⁻²² kg·m/s p = γ · m₀ · v

Compton Wavelength (λ_C = h/mc) 2.426 pm Fundamental quantum length scale

Non-Relativistic Comparison 2.743 pm -8.57% relativistic contraction