JAMB Physics 1982 Question 33

Which of the following statements is NOT true of γ-rays?

1. A.γ-rays belong to the electromagnetic spectrum
2. B.γ-rays do not carry an electron charge
3. C.γ-rays obey the inverse cube law in air
4. D.The thickness of aluminium which stops β-particles has a negligible effect on γ-radiation.
5. E.The difference between γ-rays and X-rays is that γ-rays originate from energy changes in the nuclei of atoms, while X-rays come from energy changes associated with the electron structure of atoms.