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Question

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 × 1010 m
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B
12395ΔE × 1010 m
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C
12395ΔE × 1010 cm
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D
12395ΔE × 1010 cm
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Solution

The correct option is A 12395ΔE × 1010 m
As we know,
λ = hcΔE
= 6.62×1034Js×3×108ms1ΔE×1.602×1019J
=12395ΔE × 1010 m

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