Using radio waves

1.  What substance will radio waves pass through easily?

2.  What happens when radio waves are absorbed by an aerial?

3.  Why can't you send a radio message to or from a submarine?

4.  Why is it useful to be able to reflect long wavelength radio waves?

5.  What is the wavelength of these radio waves? metres

What you need to remember
Radio waves can pass easily through and through non-metals
This is what makes them useful for carrying and programmes.
A layer in the Earth's atmosphere radio waves with long wavelengths.
We use this idea to send radio waves around the surface of the Earth.

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