General Science • PhysicsHard
What is the primary reason why primary rainbow features violet color on the inner edge and red color on the outer edge?
A. Violet light has a longer wavelength and bends less than red light during refraction
B. Red light has a shorter wavelength and deviates more than violet light
C. Violet light has a shorter wavelength and deviates more than red light during refraction✓ Correct Answer
D. Red and violet light undergo equal deviation but different reflection angles
💡 Solution & Explanation
During the refraction of white light through water droplets, shorter wavelengths like violet deviate more than longer wavelengths like red due to chromatic dispersion. This differential bending places the violet color on the inner boundary and the red color on the outer boundary of a primary rainbow. Alternative choices incorrectly invert the refractive deviation properties of different spectral wavelengths. White light separates into a continuous spectrum because refractive index varies with wavelength.
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