lenses Flashcards
1
Q
lenses
A
Acurved,transparentpiece of glass or plastic, designed torefract light.
2
Q
convex lens
A
A lens thatcurves outwardsat the centre; in other words, it isthicker at the centre.
3
Q
concave lens
A
A lens thatcurves inwardsat the centre; in other words, it isthinner at the centre.
4
Q
gently curved lens
A
cause less refraction of light and therefore have alonger focal length.
5
Q
strongly curved lens
A
cause greater refraction of light and therefore have ashorter focal length.
6
Q
focal length in lenses
A
determined by itscurvature(how curved it is).
