When white light is dispersed into its seven-colour components by a prism, which color of light bends the least?
When white light is dispersed into its seven-colour components by a prism, which color of light bends the least?
Solution
Option 1 -> Yellow has a moderate wavelength (~580 nm) and undergoes moderate refraction through the prism.
Option 2 -> Violet has the shortest wavelength (~400 nm) and the highest refractive index, causing it to bend the MOST, not the least.
Option 3 -> Green has a moderate wavelength (~550 nm) and bends at a moderate angle.
Option 4 -> Red has the longest wavelength (~700 nm) and the lowest refractive index, causing it to bend the least.
Hence, Option 4: Red -> Red light has the longest wavelength among visible colors, resulting in the lowest refractive index in glass. This causes red light to experience the least deviation (bending) when passing through a prism, while violet bends the most -> correct
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