Feet

Sit. Rep. #74: Electromagnetic radiation.

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1- Light is part of the electromagnetic spectrum.  Also called electromagnetic radiation.  In Ham Radio we call it RF – short for Radio Frequency.  The electromagnetic spectrum is broadly divided into 7 different parts depending on the wavelength of the radiation.   Remember that the frequency and the wave length are directly but inversely related.   So … Read more

Sit. Rep. #51: Sign Posts

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1- As we prepare for the canoe trips we must learn to read the river sign posts.  So – first – new words:    Eddy: The swirling of water (horizontal to stream surface) just down stream of an obstacle that causes the current to flow backwards (up stream) to fill the void behind the obstacle.  … Read more