A refractive index is the measure of how much a ray of light refracts (bends) as it passes from one medium to another—from air to water, for example.

In studying the rainbow, scientists take into consideration the fact that the electromagnetic spectrum contains other rays apart from visible light (e.g Gamma rays, X-rays, Ultraviolet light, Microwave, Infrared and radio waves), therefore, a spectrometer is used by the scientists in studying the invisible parts of the rainbow. 1. a bow-shaped display in the sky of the colours of the spectrum, caused by the refraction and reflection of the sun's rays through rain or mist.

(ˈreɪnˌbəʊ ) noun.

See more. ‘A rainbow arched over the far wing in between showers of rain and bursts of sunshine.’ ‘A brilliant rainbow formed a perfect arch on what was destined to be a great vista, where Lutyens' memorial arch [now called India Gate] stands.’ A droplet with a high refractive index will help produce a rainbow with a smaller radius. rainbow definition: 1. an arch (= curved shape) of different colours seen in the sky when rain is falling and the sun…. The rainbow flag was a way of taking these various colors and turning them into a coherent symbol, reclaimed by the LGBT community. Rainbow definition, a bow or arc of prismatic colors appearing in the heavens opposite the sun and caused by the refraction and reflection of the sun's rays in drops of rain. rainbow meaning: 1. an arch (= curved shape) of different colours seen in the sky when rain is falling and the sun…. Rainbows are part of the myths of many cultures around the world. Cambridge Dictionary +Plus The rainbow, a natural phenomenon noted for its beauty and mystical appearance, has been a favorite component of mythology throughout history.

Change your default dictionary to American English. View the pronunciation for rainbow. Learn more.

A statement of the meaning of a word, phrase, or term, as in a dictionary entry. rainbow meaning: 1. an arch (= curved shape) of different colours seen in the sky when rain is falling and the sun…. This is the British English definition of rainbow.View American English definition of rainbow.

rainbow: 1 n an arc of colored light in the sky caused by refraction of the sun's rays by rain Type of: arc , bow something curved in shape n an illusory hope “chasing rainbows ” Type of: hope , promise grounds for feeling hopeful about the future Rainbow definition is - an arc or circle that exhibits in concentric bands the colors of the spectrum and that is formed opposite the sun by the refraction and reflection of the sun's rays in raindrops… See more. It was appointed as a witness of the divine faithfulness ( Genesis 9:12-17).It existed indeed before, but it was then constituted as a sign of the covenant.

We use cookies to enhance your experience on our website, including to provide targeted advertising and track usage. Most rainbows form when the sun’s rays strike raindrops falling from faraway rain clouds. 1 An arch of colours visible in the sky, caused by the refraction and dispersion of the sun's light by rain or other water droplets in the atmosphere.

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