(A) : Excited nucleus can emit $γ$ -radiation, but excited electron can not emit $γ$ -radiation
(R) : Energy levels of excited nucleus is in MeV, excited electron is in eV and $γ$ -radiation has energy in MeV

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true and (R) is not the correct explanation of (A)

(A) is true but (R) is false

Both (A) and (R) are false

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Radiation can be produced by an excited nucleus but not by an excited electron. This is due to the fact that the energy of electronic energy levels is in range of electron volts (eV), not mega electronic volts (MeV). The energy of γ-radiations is of the order of MeV.

Energy levels of excited nucleus is in MeV. Hence, Excited nucleus can emit γ-radiation, but excited electron can not emit γ-radiation.

Both (A) and (R) are true and (R) is the correct explanation of (A).

Watch 3-min video & get full concept clarity