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Question: A unit used to express radiation exposure is the

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  1.  Roentgen
  2.  Dose
  3.  Ray
  4.  Curie

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1. Roentgen

A unit used to express radiation exposure is the Roentgen.


More information:

Roentgen (R) or röntgen is an measurement unit for measuring radiation exposure.

It was defined as the x-rays amount that produced 2.580 × 10-4 coulombs of charge collected per unit of weight (kilograms) of air at normal temperature and pressure (STP): 1 R = 0.000258 Ckg-1 in the air.

Basic SI units: 2.58 × 10−4 A⋅s/kg

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