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If change in energy (ΔE) = 3x 10 -8 j, h= 6.64x 10 -34 j-s and c= 3x 10 8 m/s then wavelength of the light is:
(1) 6.36x 10 3Å
(2) 6.36x 10 5 Å
(3) 6.64x 10-8Å
(4) 6.36x 1018Å
Ans: 6.36x 10 5Å
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