Question

what is the wavelength of transition corresponding to last line of brackett series in he+ ion?​

Answer 1

Answer:

λ=4/R

Explanation:

Answer 2

For the last line, the transition

n1= 4

n2= infinite

Z=2 ( for he+ ion)

Applying the formula,

1/λ = R(1/n₁²-1/n₂²)Z²

1/λ=R(1/4²-1/∞²)2²

1/λ=R/4

λ=4/R

The wavelength for the last line of transition of Brackett series in He+ ion,

is 4/R.

The Rydberg formula calculates it.

This formula is only valid for hydrogen-like ions.

Here, the n is a positive number, and Z indicates the atomic number of the element.