Question

Which has lowest wavelength explain ur answer... 1.lymen series. 2. Balmer series. 3. Bracket series 4. Humphrey series

Answer 1

For Lyman series n1=1n1=1

For shortest λλ of Lyman series; energy difference in two levels showing transition should be maximum i.e n2=∞n2=∞

1λ=RH[112−1∞2]1λ=RH[112−1∞2]

1λ=1096781λ=109678

λ=911.7×10−8cmλ=911.7×10−8cm

=911.7A∘

transition should be minimum i.e n2=2n2=2

1λ=RH[112−122]1λ=RH[112−122]

=109678×34=109678×34

λ=1215.67×10−8cmλ=1215.67×10−8cm

=1215.67A∘

Lyman series

Answer 2

Answer:

1. Lyman Series

Explanation:

For Lyman series n1=1n1=1  

For shortest λλ of Lyman series; energy difference in two levels showing transition should be maximum i.e n2=∞n2=∞

 

1λ=RH[112−1∞2]1λ

=RH[112−1∞2]  1λ

=1096781λ=109678

λ=911.7×10−8cm

λ=911.7×10−8cm  

=911.7A∘

 

transition should be minimum i.e n2=2n2=2

1λ= RH[112−122]1λ

= RH[112−122]  

= 109678×34

= 109678×34

λ=1215.67×10−8cm

Hence, Lyman Series.

hope it helps! :)