Wavelength

$Refraction: upon entering a medium where its speed is lower, the wave changes direction.$

Separation of colors by a prism (click for animation)

In physics, the wavelength of a sinusoidal wave is the spatial period of the wave—the distance over which the wave's shape repeats, and the inverse of the spatial frequency. It is usually determined by considering the distance between consecutive corresponding points of the same phase, such as crests, troughs, or zero crossings and is a characteristic of both traveling waves and standing waves, as well as other spatial wave patterns. Wavelength is commonly designated by the Greek letter lambda (λ). The concept can also be applied to periodic waves of non-sinusoidal shape. The term wavelength is also sometimes applied to modulated waves, and to the sinusoidal envelopes of modulated waves or waves formed by interference of several sinusoids.

单词	Optical wavelength
释义	Optical wavelength 原声例句 VOA慢速英语_科技 The Hubble Space Telescope, which was launched in 1990 and is still in use, has examined the universe mostly at optical and ultraviolet wavelengths. 哈勃太空望远镜于1990年发射，目前仍在使用中，主要在光学和紫外线波长下对宇宙进行了探测。彭博洞察 This shift in wavelengths is known as redshift and the result is that the most distant objects emitting visible light are invisible to telescopes tuned to optical wavelengths. 这种波长的偏移被称为红移，其结果是发射可见光的最远物体对于调谐到光学波长的望远镜是不可见的。英语百科 Wavelength $Refraction: upon entering a medium where its speed is lower, the wave changes direction.$ In physics, the wavelength of a sinusoidal wave is the spatial period of the wave—the distance over which the wave's shape repeats, and the inverse of the spatial frequency. It is usually determined by considering the distance between consecutive corresponding points of the same phase, such as crests, troughs, or zero crossings and is a characteristic of both traveling waves and standing waves, as well as other spatial wave patterns. Wavelength is commonly designated by the Greek letter lambda (λ). The concept can also be applied to periodic waves of non-sinusoidal shape. The term wavelength is also sometimes applied to modulated waves, and to the sinusoidal envelopes of modulated waves or waves formed by interference of several sinusoids.
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Optical wavelength

Wavelength