Uses of refraction of light

Refraction is the bending of the path of a wave phenomenon when it crosses the boundary between media with different refractive indexes.

In the case of light, this characteristic of waves is used in . . .

-- the natural cornea and lens of the living eye

-- corrective eyeglasses

-- hand-held magnifying glasses

-- microscopes

-- the objective optical element of refracting telescopes

-- the eyepieces of ANY telescopes

-- cameras (except pinhole and obscura)

-- binoculars

-- movie projectors and slide projectors

-- jewelers' loupes

-- many flashlights

-- experiments where we stand a pencil in a bowl of water and try to explain why the pencil looks like it's bent or broken

b.

explanation: