1.   Glass bends light of different colours by different amounts.

2.   Although invisible, their gravity bends light from background stars, betraying their presence.

3.   Another way to weigh the unseen matter is to look at how gravity bends the light from distant objects.

4.   He spends his days contemplating how to bend light in ways that reverse the normal patterns of refraction.

5.   It involved photographing a subject in front of a parabolic mirror that bent light in such a way as to reveal the thermal pattern formed by body heat.

6.   Light is bent when it passes through a medium of differing density.

7.   Perhaps the most surprising one is a negative index of refraction, the measure of how a given material bends light.

8.   Refractive index is a measure of the degree to which a medium bends light.

9.   The protein molecules in the aging lens slowly change in ways that make them bend light less, Koretz said.

10.   The steeper cornea bends light entering the eye more so that it focuses on the retina.