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

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

you can cut your hand off if your not