Why did Roger Bacon make the magnifying glass?

Why did Roger Bacon make the magnifying glass?

Bacon (1214–1292) was a lecturer at Oxford University who conducted many experiments with mirrors to help explain the laws of refraction and reflection. He is accredited with inventing the convex lens simply because he was the first to describe its properties, though the date when he did this during his lifetime is unclear.

A Magnifying Glass works by creating a magnified virtual image of an object behind the lens. The distance between the lens and the object must be shorter than the focal length of the lens for this to occur. Otherwise, the image appears smaller and inverted, and can be used to project images onto surfaces.

Bacon was thought to have had a variety of interests. He studied topics such as optics, and refraction of light, which led to the development of spectacles. He investigated the properties of the magnifying glass, partly based on the research of Islamic opticians such as Alhazen, who in turn was influenced by…

Invented by : Roger Bacon. Invented in year : 1250. A Magnifying Glass also known as Hand Lens, is a convex lens which is used to produce a magnified image of an object.

The first eyeglasses were estimated to have been made in northern Italy, most likely in Pisa, by about 1290: In a sermon delivered on 23 February 1306, the Dominican friar Giordano da Pisa (c. 1255–1311) wrote “It is not yet twenty years since there was found the art of making eyeglasses, which make for good vision …

A convex lens used for forming a magnified image was described in the Book of Optics by Ibn al-Haytham in 1021. After the book was translated during the Latin translations of the 12th century, Roger Bacon described the properties of a magnifying glass in 13th-century England.

Zacharias Janssen
Their invention has been credited to Zacharias Janssen. The compound microscope “gradually acquired fashionability” (Ford 19), and a flurry of interest in microscopy followed the publishing of Robert Hooke’s Micrographia in 1665.

Bacon originally designed his lenses to assist his older, farsighted colleagues so they could continue reading and therefore teaching at Oxford, because many were being forced out because of their poor eyesight.

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