Category: Physics

What is the colour of radio waves?

“Well, we can’t see them, so it means they have no colour.”We can’t see them, I agree, but does that mean they have no colour? To answer this question let’s begin with the definition of a colour. Definition from the Encyclopaedia Britannica [1]: Colour, also spelled color, the aspect of any object that may be…
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PET imaging: radioactivity to see inside the body

Medical imaging is a fantastic tool available for doctors to help find a diagnosis or to help treat patients. Almost everyone knows about X-ray Computed Tomography (CT) or Magnetic Resonance Imaging (MRI). However there is another technique, widely used but yet less famous, Positron Emission Tomography (PET). That’s a shame because PET imaging is an…
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