What type of radiation is used to kill microbes in fruit?
Alpha radiation
Beta radiation
Gamma radiation
What is radioactive powder being spilled onto clothing an example of?
Contamination
Irradiation
Penetration
During irradiation, what happens to the irradiated object?
It becomes radioactive
It does not become radioactive
Its atoms and molecules are not ionised
Why might a radioactive source be injected into a patient?
To find blockages in arteries
To kill bacteria
To produce X-ray photos
A radioactive isotope is injected so a patient's kidneys can be investigated. What properties should the isotope have?
Alpha emitter, half-life of 10 days
Gamma emitter, half-life of 6 hours
Gamma emitter, half-life of 10 days
Which of these is a precaution to reduce exposure to radiation?
Hold the sources carefully
Keep the sources as close as possible
Limit the time spent being exposed
What is a gamma knife used for?
Cutting gamma rays
Targeting cancerous tumours to destroy them
Instead of a scalpel during operations
What effect can high doses of radiation have on the human eye?
No effect
Can cause cataracts
Burst it
What properties are most desired in an isotope used to investigate the kidneys, which normally take 12 hours to process a contaminant?
What source is used often to provide the gamma radiation when irradiating fruit?
Uranium-235
Plutonium-239
Cobalt-60