WAEC Physics 2013 Paper

Concept:Electromagnetic waves are ordered by frequency, and radio waves have the lowest frequency in the spectrum.Explanation:The electromagnetic spectrum arranged from lower to higher frequency is:$\text{radio waves} < \text{microwaves} < \text{infrared} < \text{visible light} < \text{ultraviolet} < \text{X-rays} < \text{gamma rays}$.Radio waves appear before infrared in this increasing frequency order.Therefore, radio waves have a lower frequency than infrared radiation.Answer:D. radio waves