Question

The wavelength of photon obtained by electron transition between two levels in H-atom and Het are 27 and 22 respectively, then :- 22 =21​

Answer 1

Answer:

Correct option is

D

λ

2

=λ

1

/4

E

n

=

n

2

E

1

For hydrogen like species, E

n

=E

1

×

n

2

Z

2

E

n

=

λ

hc

E

n

is directly proportional to Z

2

and inversely proportional to λ.

E

He

E

H

2

=

Z

He

2

Z

H

2

2

=

λ

1

λ

2

λ

1

λ

2

=

4

1

⇒λ

2

=

4

λ

1

Hence, the correct option is D