Question

6) The energy of a photon (in J), that has a frequency of 18.21 x 10¹⁵ s^-1 is: 

A. 1.21 x 10^-17

B. 5.44 x10^-18

C. 1.99 x 10^-25

D. 3.49 x10^-48

E. 5.44 x10¹⁸

Answer 1

E ( energy) = h (Plancks constant) x (frequency) f,

$Where, h= 6.626 × 10^{-34}$

$E=18.21×10^{15} ×6.626 × 10^{-34} =1.21×10^{-17}$