Fényhossz

Fényhossz, also known as wavelength, is a fundamental property of electromagnetic radiation, including light. It refers to the distance between successive crests or troughs of a wave. In the context of light, wavelength is typically measured in nanometers (nm), with visible light ranging from approximately 400 nm (violet) to 700 nm (red).

The wavelength of light is inversely proportional to its frequency. This relationship is described by the equation c = λν, where c is the speed of light, λ (lambda) is the wavelength, and ν (nu) is the frequency. This means that as the wavelength increases, the frequency decreases, and vice versa.

Wavelength is a crucial concept in various fields, including optics, spectroscopy, and telecommunications. In optics, it helps in understanding phenomena like interference and diffraction. In spectroscopy, it is used to identify different substances based on their unique absorption and emission spectra. In telecommunications, wavelength division multiplexing (WDM) is a technique that allows multiple signals to be transmitted simultaneously over a single optical fiber by using different wavelengths.

The human eye is sensitive to a narrow range of wavelengths, which we perceive as different colors. Beyond the visible spectrum, there are other types of electromagnetic radiation with different wavelengths, such as radio waves, microwaves, infrared, ultraviolet, X-rays, and gamma rays. Each of these has unique properties and applications.