Question:
Red light differs from blue light as they have :
Red light differs from blue light as they have :
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Colour of light is fixed by its frequency, and wavelength follows from \(\lambda = c/f\).
Updated On: Nov 4, 2026
- Different frequencies and same wavelengths
- Different frequencies and different wavelengths
- Same frequencies and different wavelengths
- Same frequencies and same wavelengths
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The Correct Option is B
Solution and Explanation
Red light has frequency about \(4.3\times 10^{14}\ \mathrm{Hz}\) and wavelength about 700 nm; blue light has frequency about \(6.7\times 10^{14}\ \mathrm{Hz}\) and wavelength about 450 nm.
Since \(c = f\lambda\) with the same \(c\) (in a given medium), different frequencies imply different wavelengths.
So red and blue light differ in both frequency and wavelength.
Answer: (2) Different frequencies and different wavelengths
Since \(c = f\lambda\) with the same \(c\) (in a given medium), different frequencies imply different wavelengths.
So red and blue light differ in both frequency and wavelength.
Answer: (2) Different frequencies and different wavelengths
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