EM Spectrum Order and Uses

IGCSE Edexcel Physics
3.10-3.13 Electromagnetic Spectrum
Key Concepts: EM waves travel at the same speed in free space. Order by increasing frequency: radio to gamma.

Section A: Order

1. List the EM spectrum in order of increasing frequency. [2]
2. List the visible colors in order from red to violet. [2]

Section B: Uses and Hazards

3. Give one use for each: radio, microwave, infrared, visible, ultraviolet, X-ray, gamma. [7]
4. State one harmful effect of UV and gamma radiation. [2]
Total marks: 13

Mark Scheme

1. Radio, microwave, infrared, visible, ultraviolet, X-ray, gamma [2]
2. Red, orange, yellow, green, blue, indigo, violet [2]
3. Any correct use for each region [7]
4. UV: skin/eye damage; gamma: cancer/mutation [2]