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Q.

The  energy difference between the ground state of an atom and its excited  state  is 3×10−19. What is the wavelength  of the photon  required for this transition?

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a

6.6×10−34m

b

3×10−8m

c

1.8×10−7m

d

6.6×10−7m

answer is D.

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Detailed Solution

ΔE=hcλ
λ=6.6×10−34Js×3×108ms−13×10−19J=6.6×10−7m

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