Question detail
Explain why gamma radiation is considered weakly ionising but highly penetrating.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Atoms and nuclear radiation
Question
Explain why gamma radiation is considered weakly ionising but highly penetrating.
Answer
Gamma radiation is weakly ionising because it has a low probability of interacting with matter, allowing it to pass through materials without causing significant ionisation. However, it is highly penetrating due to its electromagnetic nature, which enables it to travel through dense materials.
Explanation
This answer effectively distinguishes the properties of gamma radiation, addressing both its ionising power and penetration capabilities. The question assesses the student's understanding of the characteristics of different types of radiation.
Common mistake
Misunderstanding Gamma Emission
Students often confuse gamma emission with other types of radiation, thinking it changes the mass number or atomic number of the nucleus.
Remember that gamma emission does not change the mass number or atomic number; it is purely electromagnetic radiation emitted from the nucleus.
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