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  • Light And Sound Waves
    532 words
    Sounds are produced by the vibrations of material objects, and travel as a result of momentum transfer when air molecules collide. Our 'subjective impression' about the frequency of a sound is called pitch. High pitch has high vibration frequency, while low pitch has a low vibration frequency. A pure musical tone consists of a single pitch or frequency. However, most musical tones are "complex summations" of various pure frequencies - one characteristic frequency, called the fundamental, and a s...
  • Man Travels Back In Time
    3,937 words
    Basic Introduction to Time Travel Time and space have fascinated man since the dawn of civilisation. People have spent aeons thinking about these concepts and the ideas behind them. The Greeks, the Romans, the English, all have stared at the heavens and wondered. And not without reason! As the boundaries of physics are pushed back and back it is becoming clear that whoever understands the laws of physics best will be able to travel through time and space, easily gaining a dominant position in th...
  • Refract Light Rays
    1,355 words
    Light is a kind of electromagnetic radiation. It is made up of vibrations between a certain group of frequencies. When light is given off from a source it spreads out over a larger area. Scientists are still dumbfounded by exactly what light is. When light hits a smooth or polished surface it 'bounces' off at the same angle that it hit. Reflecting telescopes are made of concave mirrors and they have helped astronomers chart the universe because the mirrors interact with each other to magnify wha...
  • Walker Evans To Thomas Roma
    1,122 words
    The retrospective exhibits of Walker Evans: Simple Secrets and Thomas Roma: Intimate City on display at the International Center of Photography present a cross section of each photographer's works. Thomas Roma, an active photographer, shows his interpretation of Brooklyn through a six series narrative. The Walker Evans exhibit, made possible by the Marian and Benjamin A. Hill Collection, takes a sampling of photographs from Evan's expansive photographic career. Court Portraits was Roma's first s...
  • Travel At A Speed Of Light
    1,969 words
    Light travels at about 186,000 miles per second. Now, by looking at this number you may conclude that light travels really fast. Sure it does compared to the fastest that we can go or anything that we have ever made can go. But if you look at how long it takes light to travel distances you probably won't think it's so fast anymore. The distance from Earth to the Moon is about 239,000 miles. That means that light takes 1.2 seconds to travel that far. Yeah that is still fast you may say. But light...

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