Questions:
1. There are 4 methods to measure radiation dose. Of these, grey and X measure the absorbed dose whereas sievert and Y measure it when it comes to its organic impact. Name X and Y, that are the corresponding non-SI models in these classes.
2. About 0.4 micro-sievert is the quantity of radiation your physique is uncovered to each hour. What is the collective identify for the supply of this radiation?
3. Name the town in southeast China that’s reputed for an space with a very excessive degree of radiation — about 6.4 milli-sievert per yr — on account of rocks within the space being notably wealthy in uranium and thorium.
4. For people to be killed by radiation poisoning, the worth of the ____ is 4,800 milli-sievert. Fill within the clean with a unit that denotes the quantity of a substance required to kill half the members of a inhabitants.
5. Name the micro organism famed for being probably the most radiation-tolerant organism identified in existence. It can face up to as much as 30,000 grey of gamma rays — 6,000-times greater than the dose that might kill a human.
Visual:
Name this Canadian chemist of the Manhattan Project who died in May 1946 after by chance, and infamously, setting off a fission response in shut quarters and receiving a radiation dose of 21,000 sievert.
Answers:
1. Rad and rem
2. Natural background radiation
3. Yangjiang
4. LD50
5. Thermococcus gammatolerans
Visual: Louis Slotin
Published – February 26, 2025 11:00 am IST
