1.32 x 10−6m
2.98 x 10−6m
3.32 x 10−6m
6.82 x 10−6m
8.01 x 10−6m
Correct answer is A
E=λv=hcλ⇒λ=hcE=6.6×10−34×3×1081.5×10−19=1.32×10−6
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