Question

If $R$ is Rydberg's constant, the minimum wavelength of hydrogen spectrum is:

• A. $1/R$
• B. $R/4$
• C. $4/R$
• D. $R$

Answer 1

The correct option is A $1/R$

$Forshortestwavelength,n_1=1\&n_2=\infty Now,\frac{1}{\lambda }=R[\frac{1}{{\left(n_1\right)}^2}-\frac{1}{{{(n}_2)}^2}]\frac{1}{\lambda }=R[\frac{1}{1}-\frac{1}{\infty }]\frac{1}{\lambda }=R\lambda =\frac{1}{R}.So,correctanswerisoptionA.$