Why a white light splits into seven colours (VIBGYOR) when passed through an equilateral prism and why other normal light don't split????
Answers
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the 7 colours vibgyor together make white light and when it passes through a prism all the colour lights separate
a blue light can't separate as it is a single colour light
A prism is a transparent refracting device bounded by five plane surfaces inclined at some angles. It bends the light two times and emergent ray is at an angle to the incident ray
Refraction is the bending in the path of the light when it travels from one medium to the another. The degree at which refraction will occur depends on the wavelength of the light. Each light wave has a different wavelength and will therefore deviate differently. White light is composed of light of different wavelengths (colors) i.e. violet, indigo, blue, green, yellow and red. Red has the highest wavelength and violet the lowest.
Wavelength is inversely proportional to the deviation in the path of the light. Red light suffers the least amount of deviation and violet the most. When a white light is made to pass through a prism, formation of a spectrum of seven colors occurs showing white light is a combination of seven separate colors.
Prism only acts as a medium for the dispersion of light made of the seven colors. Refraction occurs when the light falls on the prism. The wavelength and frequency of these deviated colors is different, they deviate differently at different angles due to the velocity difference of the prism. The color red therefore deviates the least since it has maximum wavelength and color violet deviates the most since it has the least wavelength.
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