Wavelength Calculator
Calculate wavelength from frequency
Frequently Asked Questions
How do I calculate wavelength from frequency?
Wavelength = Speed / Frequency: λ = v/f. For electromagnetic waves in vacuum: λ = c/f where c = 299,792,458 m/s. A 100 MHz FM radio signal has wavelength = 3 × 10⁸ / 10⁸ = 3 meters.
What is the wavelength of visible light?
Visible light ranges from 380nm (violet) to 700nm (red). Blue: 450-490nm. Green: 520-565nm. Yellow: 565-590nm. Orange: 590-625nm. The calculator converts between wavelength, frequency, and energy for any electromagnetic wave.
How does wavelength relate to energy?
Energy is inversely proportional to wavelength: E = hc/λ, where h is Planck's constant (6.626 × 10⁻³⁴ J·s). Shorter wavelengths (UV, X-rays) carry more energy than longer wavelengths (infrared, radio).
What is the electromagnetic spectrum?
From shortest to longest wavelength: gamma rays (<0.01nm), X-rays (0.01-10nm), UV (10-380nm), visible (380-700nm), infrared (700nm-1mm), microwaves (1mm-1m), radio waves (>1m). The calculator covers the full spectrum.
How is wavelength used in antenna design?
Antenna length is typically λ/4 (quarter-wave) or λ/2 (half-wave). For 2.4 GHz Wi-Fi: λ = 12.5cm, so a quarter-wave antenna is 3.1cm. The calculator helps determine optimal antenna dimensions for any frequency.