1.

The essential distinction between `X` - rays and `gamma` - rays is thatA. `gamma` - rays have smaller wavelength than `X` - raysB. `gamma` - rays emanate from nucleus while `X` - rays emanate from outer part of the atomC. `gamma` - rays have greater ionizing power than `X` - raysD. `gamma` - rays are more penetrating than `X` - rays

Answer» Correct Answer - B
The wavelength of the `gamma` - rays is shorter . However the main distinguishing feature is the nature of emission.


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