MCQ
The electron emitted in beta radiation originates from:
- AInner orbits of atoms
- BFree electrons existing in nuclei
- ✓Decay of a neutron in a nucleus
- DPhoton escaping from the nucleus
The electron emitted in beta radiation may originates from neutron and it increases the atomic number $1.$
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Reason : This smaller diameter of the core ensures that the fibre should have incident angle more than the critical angle required for total internal reflection.

