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Inside a prism, violet light deviates more than red because:
ARed light reflects more easily
BViolet light travels faster than red in glass (option)
CThe prism is thicker at the bottom
DGlass has a higher refractive index for shorter wavelengths
Answer & Solution
Correct answer: D. Glass has a higher refractive index for shorter wavelengths
1. Refractive index of glass depends on wavelength.
2. Shorter wavelengths (violet) experience a higher refractive index and thus larger bending.
3. Longer wavelengths (red) bend less, so emerge at a smaller angle of deviation.
_Source: NCERT Class 10 Science, Ch 10 "The Human Eye and the Colourful World", §10.4_
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