## The value of Planck’s constant is 6.63 10-34 Js. The velocity of light is 3 x 108 ms-1. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6 x 10^15 s-1 ?

Solution A) 50 B) 75 C) 10 D) 25

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

(a) 6.67 x 1015 (b) 6.67 x 1011 (c) 4.42 x 10-15 (d) 4.42 x 10-18 Solution

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