# physics, optics, light, lenses, refraction, index of refraction, water, oil
The refractive indices of water and olive oil are 1.33 and 1.47, respectively. This may seem a small difference – until you see the effect it has with your own eyes. On that occasion, make your students apply what they know about ...
# physics, optics, light, lenses, refraction, imaging, vision
While a convex lens can be used to see close-up objects magnified, distant objects appear smaller and upside down.