Question

Heat treatment of muscular pain involves radiationof wavelength of about 900 nm. Which spectralline of H-atom is suitable for this purpose ?​

Answer 1

Answer:

Correct option is

B

Paschen, ∞→3

We have,

λ

1

=RZ

2

(

n

l

2

1

−

n

f

2

1

)

Here if n

l

=3 and n

f

=∞

λ

1

=10

−7

×1

2

(

3

1

2

−

∞

2

1

)=

9

10

−7

=900nm