- 9. Which of the following forms of electromagnetic radiation are capable of ionization? a. Radio waves b. Visible light c. Ultraviolet light d. X-rays A B C D 10. Which of the following forms of electromagnetic radiation have the shortest wavelength? a. Radio wave b. Television wave c. Radar wave d. Dental x-ray wave A B C D
- 7. Radioactivity is: a. The emission and propagation of energy through space or a substance in the form of waves b. The emission and propagation of energy through space or a substance in the form of particles c. The process by which certain unstable atoms or elements undergo spontaneous disintegration, or decay, in an effort to attain a more balanced nuclear state d. The process by which certain unstable atoms or elements undergo spontaneous disintegration, or decay, in an effort to attain a less balanced nuclear state A B C D 8. Cathode rays are derived from which of the following types of particular radiation? a. Electrons b. Alpha particles c. Protons d. Neutrons A B C D
- 3. Current fast radiographic film requires less than % of the initial exposure times used in 1920. a. 25 b. 10 c.5 d. 2 A B C o 4. The fundamental unit of matter is the a. Proton b. Neutron c. Electron d. Atom A B c D
- 1. Radiation is defined as: a. A form of energy carried by waves or streams of particles b. A beam of energy that has the power to penetrate substances and record image shadows on photographic film c. A high-energy radiation produced by the collision of a beam of electrons with là metal target in an x-ray tube d. A branch of medicine that deals with the use of x-rays A B C D 2. The x-ray was discovered by: a. Heinrich Geissler b. Wilhelm Roentgen c. Johann Hittorf d. William Crookes A B c D
- comet is spotted approximately 375,520,000 miles from the sun. How many A.U's away is it?
