The value of Planck's constant is 6.63 × 10−34Js. The velocity of light is 3.0 × 108m s−1. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 8 × 1015 s−1?

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2 × 10−25 nm

5 × 10−18 nm

4 nm

3 × 10−7 nm

answer is C.

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Detailed Solution

Frequency = cλ = 3 × 108 ms−18 × 1015 s−1=0.375 × 10−7 m = 3.75 nm≈4 nm

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