Photo at right: The microwave apparatus with the source on the left and the detector on the right.
Microwaves are electromagnetic waves with wavelengths in the centimetre range. Microwaves exhibit the same properties that other waves exhibit. We usually demonstrate transmission and absorption, reflection, and standing waves.
NCEA & Science Curriculum
PHYS 2.3, PHYS 2.7, PHYS 3.3
“Microwaves” are usually taken to be 1 mm to 30 cm. Our apparatus produces microwaves with a wavelength of 3 cm.
Students should be made aware of the dangers of exposure to larger amplitude microwaves. Be sure your apparatus meets current safety standards.
Individual teachers are responsible for safety in their own classes. Even familiar demonstrations should be practised and safety-checked by individual teachers before they are used in a classroom.
This is part of our electromagnetic waves show. We can demonstrate electromagnetic waves over much of the electromagnetic spectrum: very low frequency, radio waves, microwaves, midwave IR, near IR, visible, uv, x-ray, gamma-ray.
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This teaching resource was developed with support from