A Laser Beam

INTRODUCTION
INTRODUCTION
INTRODUCTION This report will strive to clearly discern the differences between the average home Video Cassette Recorder (VCR) and the recently developed Digital Video Disc (DVD) system. These two home entertainment components have very clear differences. It is important for consumers to carefully consider each of these concerns before deciding on the home entertainment component that is right for them. When considering the purchase of a home VCR or DVD system, consumers should carefully examine
Nuclear Weapons and Defense
Nuclear Weapons and Defense
Nuclear Weapons and Defense A third world country is producing nuclear weapons. The country is the same that has given the United States trouble in the past. It is Iraq. Shortly after the U.S finds this out, we are being attacked by a nuclear strike from Iraq. U.S. cities are being destroyed one by one. We declare a full scale nuclear retaliation against Iraq. Huge devastation occurs throughout the world as allies join into the war. Nuclear winter starts to develop. Over half of the world’s popu
Photography is a technique of producing permanent
Photography is a technique of producing permanent
Photography is a technique of producing permanent images on sensitized surfaces by means of the photochemical action of light or other forms of radiant energy. In today\'s society, photography plays important roles as an information medium, as a tool in science and technology, and as an art form, and it is also a popular hobby. It is essential at every level of business and industry, being used in advertising, documentation, photojournalism, and many other ways. Scientific research, ranging from
Lasers
Lasers
Lasers The light from lasers differs from ordinary light in several important aspects. Ordinary light from a light bulb travels randomly in all directions (unless the bulb is equipped with an integral reflector that directs the light). The light is thus incoherent. Even when incoherent light is directed with a reflector, it still spreads rapidly. The light from a laser is temporary and spatially coherent. This means that all of the wave-fronts of light are lined up in time and space (see Diagram