Question

The essential distinction between $X$-rays and - $y$ rays is that

• A. y -rays have smaller wavelength than -rays
• B. y -rays emanate from nucleus while X-rays emanate from outer part of the atom
• C. y -rays have greater ionizing power than X-rays
• D. y -rays are more penetrating than X-rays

Answer 1

Answer: (B)

The essential distinction between $X$-rays and $y$-rays is that $y$-rays emanate from nucleus while $X$-rays emanate from outer part of atom.