vector illustration of concave lens and convex lens
Schlüsselwörter
background,
compare,
concave,
concept,
convergence,
converging,
convex,
crystal,
curvature,
divergence,
education,
effect,
element,
equipment,
experiment,
eye,
eyeglass,
eyesight,
focal length,
focal point,
sharpened,
glasses,
lens,
light,
logotype,
object,
optical,
optical,
optic,
physics,
prism,
ray,
ray,
refraction,
research,
science,
scientific,
shape,
sight,
signs,
spectrum,
surface,
symbol,
triangular,
visible,
vision
Deutsch
