Question

The ratio of the wave lengths of the
first line in the the Lyman series of
the spectrum of Hydrogen atom
and the first line in the Balmer
series of the spectrum of He+ is​

Answer 1

Answer:

27/5

Explanation:

For Lyman series

n

1

=1 and n

2

=2...

For 1

st

line of Lyman series

⇒

λ

1

=RZ

2

(

(1)

2

1

−

(2)

2

1

)=RZ

2

(

4

3

)=

4

3

R

For Balmer series, n

1

=2,n

2

=3

⇒

λ

1

=RZ

2

(

(2)

2

1

−

(3)

2

1

)=RZ

2

=

36

5

R

Ratio=

4

3

R/

36

5

R⇒

4

3

×

5

36

=

5

27

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Answer 2

Explanation:

use formula of wavelengths

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