In a hydrogen atom, an electron jumps from the third orbit to the first orbit. Find out the frequency and wavelength of the spectral line.

Answer

A, B, C, D

Explanation

a.`v= 3.29 xx 10^(15)[(1)/(1^(2)) - (1)/(2^(2))] = 2.47 xx 10^(15) cps`
b. `lambda= (c )/(v)`
` lambda = 3 xx 10^(8)//2.47 xx 10^(15) m`
`= 1.215 xx 10^(-7) m = 1.215 xx 10^(3) Å`
UV region of EMR