Electromagnetic Spectrum

2. The peak or highest point above the resting line of a wave.
4. Wave which moves backwards and forwards.
7. state The straight line in the middle of a graph which happens when there is no energy.
9. Long wavelengths are used for this.
10. Invisible to human eyes and a form of electromagnetic radiation which has a wavelength just smaller than violet.
12. Invisible to human eyes but we can feel it as heat, has a wavelength just larger than red.
14. The lowest point below the resting line of a wave.
18. The power of the wave.
19. Unit used to measure frequency.

1. Frequency is how many of these happen in a second.
3. The distance between two crests or troughs on a wave.
5. How many wave peaks pass a certain point after a certain amount of time.
6. ray The smallest type of wavelength on the EMS.
8. Visible colour with the smallest wavelength.
11. Acronym used to remember visible colours on the spectrum.
13. Height of the wave above the resting line.
15. wave The largest type of wavelength on the EMS.
16. Electromagnetic spectrum acronym.
17. shift What makes stars and galaxies look different colours due to them moving closer or further away relative to the observer because it changes the wavelength of the light coming from it.
20. Visible colour with the largest wavelength.