Physics
The diagram in figure shows a radioactive source S placed in a thick lead walled container. The radiations given out are allowed to pass through a magnetic field. The magnetic field (shown as x) acts perpendicular to the plane of paper inwards. Arrows show the paths of the radiations A, B and C.
(a) Name the radiations labelled A, B and C.
(b) Explain clearly how you used the diagram to arrive at the answer in part (a).
Radioactivity
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Answer
(a) The radiations are —
- A → γ radiation
- B → α radiation
- C → β radiation
(b) The radiation labelled as A pass undeviated which means that they are uncharged (or neutral) so they must be γ radiations.
The radiation labelled as B turn to the left which means that they are positively charged so they must be α radiations.
The radiation labelled as C turn to the right which means that they are negatively charged so they must be β radiations.
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