Interpretation:
Types of radiations shown in figure are to be identified and explained.
Concept introduction:
An alpha particle is composed of two protons and two neutrons and is the same as a helium nucleus. Alpha particles are positively charged. Gamma particles have no charge.

Answer to Problem 107A
Two type of radiation−
- Alpha radiation.
- Gamma radiation.
Alpha particles deviate to the negative plate. Gamma rays are unaffected.
Explanation of Solution
Alpha particles are positively charged and are therefore attracted to the negative plate in an electric field.
Gamma rays are
Electric field can change the direction of alpha. Electric field does not effect on gamma particles
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