An illustration of refraction of light. The straw appears bent, thanks to refraction of light as it enters liquid from air. In historic India, the Hindu educational facilities of Samkhya and Vaisheshika, from round the early hundreds of years AD produced theories on light. According to the Samkhya faculty, https://flat-pack-container-house11098.bloggip.com/39119831/the-ultimate-guide-to-folding-container-house