The value of Planck's constant is $6.63 \times 10^{-34} \ J \ s$. The velocity of light is $3.0 \times 10^8 \ m \ s^{-1}$. Which value is closest to the wavelength in nanometres of a quantum of light with frequency of $8 \times 10^{15} \ s^{-1}$?
- A$3 \times 10^7$
- B$2 \times 10^{-25}$
- C$5 \times 10^{-18}$
- D$4 \times 10^1$
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