Question

Wavelength of the first line of Lyman series in
Hatom is (RH = Rydberg constant)
​

Answer 1

Explanation:

1

λ

=

R

(

1

(

n

1

)

2

−

1

(

n

2

)

2

)

⋅

Z

2

where,

R = Rydbergs constant (Also written is

R

H

)

Z = atomic number

Since the question is asking for

1

s

t

line of Lyman series therefore

n

1

=

1

n

2

=

2

since the electron is de-exited from

1

(

st

)

exited state (i.e

n

=

2

) to ground state (i.e

n

=

1

) for first line of Lyman series.