N4 Waves & Radiation

2. – The time taken for half of the radioactive nuclei in a sample to decay.
4. – High-energy electromagnetic waves used for medical imaging.
5. – Very high-frequency electromagnetic radiation released from atomic nuclei.
7. – When a wave bounces back after hitting a surface.
9. – Electromagnetic radiation felt as heat and used in remote controls.
10. – The maximum displacement of a wave from its central position.
12. – How many complete waves pass a point in one second.
13. – Electromagnetic waves used in cooking and communication.
16. – Type of wave where the particles vibrate parallel to the direction the wave travels.

1. – The bending of a wave’s path as it enters a different medium.
3. – The constant, low-level radiation present in the environment.
6. – The distance between two identical points on consecutive waves.
8. – Type of wave where the particles vibrate at right angles to the direction of travel.
11. – Radiation from the Sun that can cause sunburn.
14. – A high-speed electron emitted from an unstable nucleus.
15. – Type of nuclear radiation consisting of two protons and two neutrons.