Question

Calculate the energy in joule corresponding to
light of wavelength 45 nm:
(Planck's constant h=6.63 x 10-34 Js; speed of
light c= 3 × 108 ms
(a) 6.67 x 1015 (b) 6.67 x 1011
(c) 4.42 x 10-15 (d) 4.42 x 10-18
lanna
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Answer 1

Energy(E) = hcλ

E=(6.63×10−^34×3×10^8*45×10^−9)J

E=4.42×10^–18J

So your answer = 4 th

Answer 2

4.42 x 10-18 is the correct answer