TOPIC: UNITS OF MEASUREMENT AND DOSIMETRY 🌟IMPORTANT POINTS TO REMEMBER🔹Fundamental units: Fundamental units are units which are independent of each other and have their own standard (base).🔹Derived units: Derived units are units which are not having their own standard (base) and are obtained from fundamental units.🔹SI unit: In 1960, the new system of units – the SI units – was introduced.🔹Units should be well-defined, reproducible, comparative, sensitive, objective, repeatable and linear.🔹Air is used as the measurement material due to its availability, reproducibility, accuracy and sensitivity and its atomic number. 12. c
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