EXERCISES, LESSON 2
REQUIREMENT. The following exercises are to be answered by marking the lettered
response that best answers the question, by completing the incomplete statement, or by
writing the answer in the space provided at the end of the question. After you have
completed all the exercises, turn to "SOLUTIONS TO EXERCISES" at the end of the
lesson and check your answers.
The greatest use of radiation sources is found in:
Which of the following is a source of natural background radiation?
Radiation from space.
The most common machine for producing radiation is the: