Modern Physics 1 Question 15

12. Hydrogen (1H1), deuterium (1H2), singly ionised helium (2He4)+and doubly ionised lithium (3Li8)++all have one electron around the nucleus. Consider an electron transition from n=2 to n=1. If the wavelengths of emitted radiation are λ1,λ2,λ3 and λ4, respectively for four elements, then approximately which one of the following is correct?

(a) 4λ1=2λ2=2λ3=λ4

(2014 Main)

(b) λ1=2λ2=2λ3=λ4

(c) λ1=λ2=4λ3=9λ4

(d) λ1=2λ2=3λ3=4λ4

Show Answer

Solution:

  1. For hydrogen atom, we get

1λ=RZ21121221λ1=R(1)2341λ2=R(1)2341λ3=R(2)2341λ4=R(3)2341λ1=14λ3=19λ4=1λ2



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक