What is Wavelength? Definition, Meaning & Example
Wavelength is the distance between successive crests or troughs in a wave or between any two identical points on consecutive waves.
TL;DR: Wavelength is the distance between successive crests or troughs in a wave or between any two identical points on consecutive waves.
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Wavelength: Wavelength is the distance between successive crests or troughs in a wave or between any two identical points on consecutive waves.
Explanation
Wavelength is measured in distance units and is represented by the Greek letter lambda. Different types of waves have vastly different wavelengths. Radio waves have wavelengths from centimeters to kilometers. Visible light has wavelengths of nanometers. Gamma rays have extremely short wavelengths. Wavelength and frequency are inversely related - shorter wavelengths have higher frequencies. The product of wavelength and frequency equals the wave speed. Different wavelengths of visible light appear as different colors. Understanding wavelength is essential for optics, radio communication, and understanding the electromagnetic spectrum.
Example
Red light has a longer wavelength around 700 nanometers while violet light has a shorter wavelength around 400 nanometers.
Frequently Asked Questions
What determines the wavelength of a wave?
Wavelength depends on the source of the wave and the medium it travels through. In a given medium, the speed of the wave divided by its frequency gives the wavelength. Different sources produce different wavelengths.
How are wavelength and frequency related?
Wavelength and frequency are inversely proportional. As wavelength increases, frequency decreases, and vice versa. Their product always equals the wave speed in that medium.
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