Some radio waves can be received far beyond the horizon. Microwaves are used to communicate with satellites in orbit.
Which statement about the upper atmosphere explains this?
Microwaves are reflected by it, but all radio waves pass through it
Some radio waves are reflected by it, but microwaves pass through it
Radio waves and microwaves are both reflected back down by it
Radio waves and microwaves are both absorbed completely by it
51 exam-style questions on OCR GCSE Physics 5.3 Wave interactions, covering 5.3.1 Wavelength and how substances affect waves, 5.3.2 Wave velocity in different substances, 5.3.3 Convex and concave lenses, 5.3.4 Ray diagrams for reflection and refraction, and 5.3.5 Colour, absorption and reflection. Each one has a worked solution and a mark scheme showing where the marks go.