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Q.

If the longest wavelength in the ultraviolet region of  hydrogen spectrum is λ0 then the shortest  wavelength in its infrared region is :

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a

365λ0

b

467λ0

c

203λ0

d

274λ0

answer is C.

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Detailed Solution

hcλ0  =  −13.6  122−1          UV  regionhcλmin  =  −13.6  1∞−132          IR  regionλmin=34  λ019  =    274  λ0

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