Here's something mind-bending: the light you see, the WiFi carrying your messages, the X-rays seeing your bones, and the microwaves heating your food are ALL the same thing — electromagnetic waves! They only differ in wavelength and frequency. Radio waves can be kilometres long; gamma rays are smaller than atoms. All travel at 300,000,000 m/s through space. The whole spectrum is just one continuous family of energy-carrying waves!
This introduction covers The Same Wave, Different Energies within Electromagnetic Spectrum for GCSE Physics. Revise Electromagnetic Spectrum in Waves for GCSE Physics with 17 exam-style questions and 15 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 1 of 13 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Electromagnetic Spectrum
What is the speed of all electromagnetic waves in a vacuum?
Explain the potential dangers of ultraviolet radiation to humans.
Quick recall flashcards
Speed of EM waves in vacuum?
3 × 10⁸ m/s (speed of light)
Are all EM waves transverse?
Yes, all EM waves are transverse