a lens is any piece of transparent material,such as glass,that has at least one evenly curve surface .some of the surfaces are curved outward.some are curved inward and two of the lenses have a fLat side .all these lenses can be divided into two groups the lenses that curved outward are thicker at the center than at the edges.they are converging lenses the lenses that curved inward are thinner at the center than at the edges.they are diverging lenses.the word "converge"means"to bring together"and the word "diverge"means "to speard apart"
1)what is the text about
2)what is lens
3)how many curve surfaces does lens have at least
4)how many groups of lens are three
5)what are they
6)what does "diverging lens"mean
What is lens
Jawaban:
1)About eye lenses
2)a lens is any piece of transparent material,such as glass,that has at least one evenly curve surface .
3)Two (2)
6)they are diverging lenses