I don't have your lab observations, but I can give you the reason why refraction occurs.
Refraction refers to the bending of light at the interface as it passes through mediums of different densities.
Refraction occurs because light travels at different speeds in mediums with different densities.
Hope this helps!
Answer:
What had been an almost purely agricultural economy in 1800 was in the first ... The Southern lag in industrial development did not result from any inherent economic ... As both the North and the South mobilized for war, the relative ... He made good on his promise by signing the Homestead Act into law on ...
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Answer:A.Human geographer.
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