What is diopetre ???write 4 marks answer
Answers
Explanation:
A dioptre or diopter is a unit of measurement of the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in metres. It is thus a unit of reciprocal length. For example, a 3-dioptre lens brings parallel rays of light to focus at ¹⁄₃ metre
Answer:
A dioptre (UK), or diopter (US) is a unit of measurement of the optical power of a lens or curved mirror.
As the dioptre increases, the lens becomes thicker, making the object look bigger. The higher the dioptre, the more magnification the lens provides. A flat window has an optical power of zero dioptres, and does not converge or diverge light.
It is also important to note that the power of the lens is inversely related to the focal distance (working distance). Meaning, as the power of the lens increases, so the focal distance decreases, making it more difficult to perform tasks with high magnification lenses.
See Mantis Compact low magnification stereo microscope if higher magnification is required.
Magnification is calculated by simply dividing the dioptre by 4, then adding 1.
e.g. 3 dioptre lens = 3/4 + 1 = 1.75x
Therefore, objects viewed through a 3 dioptre lens will appear 175% bigger than normal.
Explanation:
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