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Last few questions from a local quiz for charity.
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(1) Essential daily reading for Alan Kenny and Agnetha Faltskog (2 words D N); (2) Knowledge of this might be useful to a heron (2 words S L);
(3) Singles and doubles link six number sixes (2 words B R); (4) Place to touch down down under (2 words K S).
(3) Singles and doubles link six number sixes (2 words B R); (4) Place to touch down down under (2 words K S).
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For more on marking an answer as the "Best Answer", please visit our FAQ.2) I believe the answer is SNELL'S LAW, also known as the Law of Refraction. A heron, standing on the edge of a lake, for instance, waiting to spear a fish, needs to know that refraction of light by the water causes the fish to appear shallower than it actually is. So the Heron needs to aim lower than the fish appears to be. Google "refractive index".
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