Google’s definition of Physics is “The branch of science concerned with the nature and properties of matter and energy. The subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light, and other radiation, sound, electricity, magnetism, and the structure of atoms.”
Physics is part of our everyday life in ways that we can’t even imagine. It is the reason why the sky is blue, the grass is green, and so much more. We never think of how things happen or why, because we are so used to everyday life that it never crosses our minds to stop and think.
Physics affects our health, energy, communication, transportation, electronics, and much more. It has to do with pretty much everything we, and everybody else does. It’s hard to go throughout the day not doing something that involves physics. Physics also has everything to do with energy, velocity, mass, force, acceleration, and gravity.
When you woke up this morning were you hot? Or was your air conditioner on? How about your television? How did you get to school today? Physics controls all of these things.
Physics is responsible for the electricity in our homes, which is something that is pretty well mandatory in this era. Physics provides the energy that powers everything from your phone to the lights in refrigerators, which is also pretty mandatory when it is dark. When you go up were you able to walk? Physics has everything to do from your muscles to how your foot pushes off the ground.
Physics also has control over maintaining our health. There is a branch of medical science that deals specifically with physics, medical physics. Every test and all your vitals are done with physics. The blood pressure cuff is a good example of a vital test that physics controls. X-rays, ultrasounds, defibrillator, radiation therapy for cancer, and laser eye therapy. Something as simple as your vitals is based on Physics.
Do you know how internet actually works? Physics has pretty much everything to do with it. Physics is how we communicate through devices like email, texting, calling, and social media. Fun fact, physics has a lot to do with the cables that that connect nations across the oceans. These cables are called Submarine Communication Cables, and there are about two hundred of them in existence. Their role is to connect the continents, except for Antarctica, and the core of the wire is made out of optical fibers. Without physics it wouldn’t be possible to call your neighbor, or even call overseas. Lots of families rely on the internet and phone to talk to relatives, some who may have moved, or even some in the military.
Since I wear contacts and glasses, I wanted to throw in a little segment about how physics helps you see when your eyes won’t. The way you see has a lot to do with physics, and as you know physics has a lot to do with light. An easy way to find out what kind of spectacle lens you need for nearsightedness, you must solve the equation: P=1/do+1/di=1/∞+1/−0.285 m, where 0.285 is the centimeters away from the eye (0.285 is input to show an example). An easy way to find out what kind of spectacle lens for farsightedness, you must solve the equation: P=1/do+1/di=1/0.235 m+1/−0.985 m away from the eye (-0.985 is an input to show an example). Laser vision for the eye is also to correct eyes by using physics.