Physics - Electromagnetism - Electromagnetic waves - EM Spectrum Quiz

10 questions. Q1: 'All EM waves travel at ___ in vacuum' (3×10⁸ m/s). Q2: 'Which has the longest wavelength?' (Radio waves). Q3: 'Which has the highest frequency?' (Gamma rays). Q4: 'Microwaves heat food by ___' (Causing water molecules to vibrate). Q5: 'X-rays are used in medicine because they ___'