Physics in Everyday Life

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Physics in Everyday Life

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Just about everything you do from moving to eating to listening to music involves physics. Now that I have really explored them I think it is hard to go about our day and not do something that involves physics. Some of the things I will talk about are getting out of bed, the eye and how eye glasses help a person see better, speakers, the Frisbee, sailing, and the pulleys I use to get my jeep unstuck in the mud when I ride in the woods. All of these require energy, and energy is what physics is all about. There is kinetic energy, potential energy, conservation of energy, velocity, acceleration, mass, force, and gravity. Energy gives you the ability to do work. Energy is everywhere in nature …show more content…

After light passes through the cornea, a portion of it passes through the pupil. g. The pupil is the black portion in the middle of the eyeball. The pupil is black looking because the light that enters the eye is absorbed on the retina and does not exit the eye. So when you look at someone no light is exiting their pupil and coming into your eye. 3 The size of the pupil opening can be adjusted by the dilation of the iris. The iris is the colored part of the eye it can be blue, brown, hazel or other colors; it is a diaphragm that is capable of stretching and reducing the size of the opening. In bright-light the iris reduces the pupil opening and limits the amount of light going into the eye. And in low-light the iris increases the amount of light that enters the eye. Light that passes through the pupil opening will enter the crystalline lens. The crystalline lens is made of layers of a fibrous material that has an index of refraction of roughly 1.40. Unlike the lens on a camera, the lens of the eye is able to change its shape and fine tune the image. The lens is attached to the ciliary muscles. These muscles relax and contract in order to change the shape of the lens. By carefully adjusting the lenses shape, the ciliary muscles assist the eye in the l task of making an image on the back of the eyeball.
The inner surface of the eye is known as the retina. The retina contains the rods and cones that serve

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