When electronic transition occur from higher energy state to lower energy state with energy difference equal to ΔE electron volts, the wavelength of the line emitted is approximately equal to :
A
12395ΔE× 10−10 m
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B
12395ΔE× 1010 m
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C
12395ΔE× 10−10 cm
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D
12395ΔE× 1010 cm
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Solution
The correct option is A12395ΔE× 10−10 m As we know, λ = hcΔE = 6.62×10−34Js×3×108ms−1ΔE×1.602×10−19J =12395ΔE× 10−10 m