... different colors of light have different focal lengths, they can't be brought into focus properly, which causes a distorted image. Sagging of the Objective Lens: the lens is so thick in the center and thin on the edges, that it can't be supported properly and becomes deformed causing light to come into focus at different focal lengths. The image therefore becomes distorted. Unwanted Refraction ... : pouring molten glass into a mold makes lenses. Air bubbles form in the lens as the liquid gas cools. The ... air bubbles cause, distorted images due to extra refractions. Opaque: when some w...

• Word Count: 3183
• Approx Pages: 13
• Grade Level: High School

... sort of mechanical device. There are two types of systems, liquid and air systems, which each use either a pump or fan to distribute the warm air. Active solar cooling is done by turning the sun's radiation into electrical current and the used to run a cooler. My question is, would a clear layer as thin as saran wrap actually keep more heat in a solar oven or ... ...

• Word Count: 273
• Approx Pages: 1
• Grade Level: High School

Ozone Layer Depletion Imagine a world with bad air, polluted water, starvation, increased cancer conditions and even limited land. It is all possible thanks to the effects of ozone depletion and global ... has already begun, we are already thinking of ways to reduce the effects it is causing; hoping that the processes will end. The Earth's atmosphere is divided into several layers. The lowest region, the troposphere, the next layer, the stratosphere, and the most atmospheric ozone are concentrated in a layer in the stratosphere, about ... strong odor oppose to normal oxygen which has two oxy...

• Word Count: 942
• Approx Pages: 4
• Grade Level: High School

... solar energy is by using one of two potential and different kinds of artificial collectors. These artificial collectors can be either flat plate or concentrating collectors. Flat plate collectors are thin boxes with a see-through cover. These collectors are then placed on rooftops facing the direction of the sun and are used for water and space heating. Concentrating collectors, however, ... large windows and absorbing materials. If a building is designed in this manner it can reduce an energy bill by up to 50 percent. For the purposes of cooling, an absorption air conditioner uses a so...

• Word Count: 720
• Approx Pages: 3
• Grade Level: Undergraduate

... it all backwards. We are so paranoid about some carbon monoxide exhausted by a factory in New Jersey that we forgot that one large volcanic eruption could cover the earth with a thin layer of dust. Or what about the 300 people that just died in Morocco buried under the rubble of their houses? Or the devastating earthquake in Iran a few weeks ago ... some Styrofoam, maybe. The Earth is going to brush us off like a bad case of fleas. The water will recover; the air will recover and if it's true that plastic does not decompose than the Earth will just incorporate plastic into a new pyridin...

• Word Count: 894
• Approx Pages: 4
• Grade Level: High School

... so that I could have a good view of the green-blue ocean. As I stepped out of the car, I got my first taste of the salty sea air. After dragging all of my luggage up the flight of stairs that never seemed to end, I was already exhausted. But I still had to pick out my room ... there and watch. I sat there with my arms wrapped around my legs just taking in all the beauty that surrounded me. I wiggled my toes in the thin South Carolina sand that had been warmed by the sun. I watched as the gentle breeze tossed the water playfully, creating mystical waves. The sky was light ... with an ass...

• Word Count: 659
• Approx Pages: 3
• Grade Level: High School

... at this point, I would like to remind them that the "tailor-made" packages and software we use nowadays, do not materialise out of thin air. Someone, somewhere has made the effort to design them. Newer, better technology is coming into the market. There is stiff competition between the I.T. companies - and my opponents say "our creativity is being hindered" We cannot blame the Internet ... can compare it with life itself All around us, are temptations to lure us. We see people smoking, drinking and indulging in a variety of other vices. Yet, do we give into such temptations? We exercise...

• Word Count: 562
• Approx Pages: 2
• Grade Level: High School

... everything I believe in, now everything that I knew or thought I knew no longer had meaning. Before my feet would move, I fell into a trance. My heart started racing and I began to feel moisture sit in my palms. As I stared down the aisle, into thin air, my mind kept replaying the most horrific night of my life. Once again, I could feel a rush of emotions ready to uproar ... I do, I knew that I was going to be alright. It's like; the angels sounded their trumpets, washed away all my hurt and gave me back my peace of mind. I placed myself into the hands of another man, once more, but thi...

• Word Count: 766
• Approx Pages: 3
• Grade Level: High School