X-rays

Syllabus tag: KCSE | Physics | Form 4 | Topic 37 X-rays

Lesson objectives

By the end of this topic, you should be able to:

• Describe the production of X-rays in an X-ray tube.
• Distinguish hard from soft X-rays and explain how each is controlled.
• State the properties of X-rays.
• State the uses and dangers of X-rays and the precautions taken.

Summary

X-rays are electromagnetic waves of very short wavelength produced when fast-moving electrons are suddenly stopped by a heavy metal target. Their penetrating power is controlled by the accelerating voltage and their intensity by the filament current. They are ionising and therefore dangerous.