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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a
2 × 10−25 nm
b
5 × 10−18 nm
c
4 nm
d
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
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?