history of sperical mirrors human civilization
Answers
Answered by
6
Earlier still or dark water
collected in a vessel was considered or used as mirrors by ancient people. Then
as days passed obsidian mirrors came in to existence followed by metal coated
glass mirrors this led to discovery of metal coated spherical or parabolic
mirrors. A spherical mirror is a mirror which has the
shape of a piece cut out of a spherical surface. There are two types of
spherical mirrors: concave, and convex. These mirrors are also known
as parabolic mirrors discovered in mid9th century Ibn al haytham and Ibn
sahl.parabolic mirrors were described in classical antiquity written by
mathematician-Diocles . In addition to these researches Ptolemy also carried
out experiments with curved polished iron mirrors and discussed about convex
spherical and concave spherical mirrors in his book optics.
Inspite of these researches finding the focal
length of spherical mirror was a though task but finally Ibn al Hay tham got a
break through by finding out the focal length of curved surfaces using the laws
of reflection.he stated that “All the
reflected rays of a mirror converge or diverge and meet at a point known as
focus and the distance between focus and pole of mirror is known as focal point
of mirror.’’Also many scientists came to a conclusion that spherical
mirrors can be divided into concave and convex mirrors.
Spherical
mirrors
Concave
mirrors
Convex mirrors
The
invention of concave and convex mirrors led to many changes and have become a
part of our life .
pankaj12je:
tihis is elaborated 1 hope this helps u and pls mark as best
Answered by
4
the idea of mirrors came into existencce long back when people saw their images on water and poluted surfaces etc.....
the history of mirrors started in 6000 BC the earlist man made mirrors were pieces poluted stones.
the first glass mirrors were produced in 1 A.D. by romans
the first modren silver glass was created by justus von liebig a german chemist in 1835.
the invention of glass blowing method during the 14 th century led to th ediscovery of spherical mirrors.which increased the popularity of glass mirrors.
by th e end of 18 th century decorative mirrors are widely used.
new cheaper tchniques of mirrors in the 19 th century led to a great proliferation in their use. now a days wide spreadly using.
the history of mirrors started in 6000 BC the earlist man made mirrors were pieces poluted stones.
the first glass mirrors were produced in 1 A.D. by romans
the first modren silver glass was created by justus von liebig a german chemist in 1835.
the invention of glass blowing method during the 14 th century led to th ediscovery of spherical mirrors.which increased the popularity of glass mirrors.
by th e end of 18 th century decorative mirrors are widely used.
new cheaper tchniques of mirrors in the 19 th century led to a great proliferation in their use. now a days wide spreadly using.
Similar questions