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The emission series of hydrogen atom is given by `(1)/(lambda)=R((1)/(n_(1)^(2))-(1)/(n_(2)^(2)))` where R is the Rydberg constant. For a transition from `n_(2)` to `n_(1)`, the relative change `Deltalambda//lambda` in the emission wavelength if hydrogen is replaced by deuterium (assume that the mass of proton and neutron are the same and approximately 2000 times larger than that of electrons) is

A

`0.025%`

B

`0.005%`

C

`0.0025%`

D

`0.05%`

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A
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Assertion Wavelength of characteristic X-rays is given by (1)/(lambda)prop((1)/(n_(1)^(2))-(1)/(n_(2)^(2))) in the transition from n_(2) to n_(2) . In the above relation propotionally constant does not deped upon the traget material. Reason Continuous X-rays are target independent.

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For balmer series in the spectrum of atomic hydrogen the wave number of each line is given by bar(V)=R_(H)(1)/(n_(1)^(2))-(1)/(n_(2)^(2)) where R_(H) is a constant and n_(1) and n_(2) are integers which of the following statement (S) is / are correct 1 as wavelength decreases the lines in the series converge 2 The integer n_(1) is equal to 2 3 The ionization energy of hydrogen can be calculated from the wave number of these lines 4 The line of longest wavelength corresponds to n_(2)=3

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