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Among all the seven-coloured lights, which colour deviates the most after falling on a prism?
Yellow
Indigo
Violet
Red
Violet
When white light passes through a prism, it disperses into its constituent colors. Violet light undergoes the maximum deviation because it has the shortest wavelength and experiences the highest refractive index in the glass material of the prism.
When white light passes through a prism, it disperses into its constituent colors. Violet light undergoes the maximum deviation because it has the shortest wavelength and experiences the highest refractive index in the glass material of the prism.
Think of light as a group of runners on a track; the shorter wavelength colors are like runners who are more easily 'tripped up' or slowed down by the resistance of the material, causing them to turn the corner (deviate) more sharply than the others.
VIBGYOR (Violet, Indigo, Blue, Green, Yellow, Orange, Red) - listed in order of increasing wavelength and decreasing deviation.
╬┤тЙИ(nтИТ1)A тАФ approximate formula for deviation ╬┤ in a thin prism with angle A and refractive index n
v=fтЛЕ╬╗ тАФ relationship between speed, frequency, and wavelength
According to Cauchy's equation, the refractive index of a material depends on the wavelength of light: n(╬╗)тЙИA+╬╗2BтАЛ. Since violet light (lambdaтЙИ380тИТ450┬аnm) has a shorter wavelength than red light (lambdaтЙИ620тИТ750┬аnm), it travels slower in the glass, causing it to bend (deviate) more acutely from its original path.
Refractive index is inversely proportional to wavelength for most transparent materials.
Violet light deviates the most; Red light deviates the least.
Dispersion is the phenomenon of splitting white light into seven colors.
Formation of a rainbow
Spectroscopy and prism-based light analysis
Red light has the longest wavelength and therefore travels fastest through the prism, resulting in the minimum deviation.
Option D (Red) is the color that deviates the least.
C is correct тАФ Violet light experiences the greatest amount of bending (deviation) due to its shorter wavelength and higher refractive index interaction with the prism.
Always remember the VIBGYOR sequence; as you go from V to R, wavelength increases and refractive index (and deviation) decreases.
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