EXERCISES, LESSON 1
INSTRUCTIONS. The following exercises are to be answered by marking the lettered
response that best answers the question, or 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.
In the discovery of x-rays, what was the critical difference between Roentgen's
observation and the observations of others who had previously produced x-rays
a. Refracted rays unaffected by magnetic fields.
b. Passage of the rays through black paper.
Fluorescence of barium platinocyanide.
d. Production of a photographic image.
That special branch of science having to do with radiant energy and radiant
substances in both diagnosis and treatment is called:
Which of the following names best applies to the smallest particle of the element
tungsten that has all of the properties of tungsten?