Structure of Atom - Result Question 7

####7. If the energy of a photon is given as 3.03×10−19J then, the wavelength (λ) of the photon is :

(a) 6.56nm

(b) 65.6nm [2000]

(c) 656nm

(d) 0.656nm

Show Answer

Solution:

  1. (c) The energy of photon,

E=hcλ=3.03×10−19

or λ=6.626×10−34×3×1083.03×10−19

or λ=19.8783.03×10−7=6.56×10−7m=656nm

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