Calculate the energy in joule corresponding to light of wavelength 45 nm. (Planck,s constant, h = 6.63 $ \times $ 10$-$34 J s, speed of light, c = 3 $ \times $ 108 m s$-$1)

Question

Calculate the energy in joule corresponding to light of wavelength 45 nm. (Planck,s constant, h = 6.63 $ \times $ 10^$-$34 J s, speed of light, c = 3 $ \times $ 10⁸ m s^$-$1)

6.67 $ \times $ 10¹⁵

6.67 $ \times $ 10¹¹

4.42 $ \times $ 10^$-$15

4.42 $ \times $ 10^$-$18

Solution

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