The velocity of Planck's constant is 6.63 $ \times $ 10$-$34 J s. The velocity of light is 3.0 $ \times $ 108 m s$-$1. Which value is closest to the wavelength in nanometers of a quantum of light with frequency of 8 $ \times $ 1015 s$-$1 ?

Question

The velocity of Planck's constant is 6.63 $ \times $ 10^$-$34 J s.

The velocity of light is 3.0 $ \times $ 10⁸ m s^$-$1. Which value is closest to the wavelength in nanometers of a quantum of light with frequency of 8 $ \times $ 10¹⁵ s^$-$1 ?

2 $ \times $ 10^$-$25

5 $ \times $ 10^$-$18

$4 \times {10^1}$

3 $ \times $ 10⁷

Solution

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