... , microwaves, x-rays, and TV and radio transmissions are all kinds of electromagnetic waves. They are all same kind of wavy disturbance that repeats itself over a distance called the wavelength. The wave, or "disturbance," is in an invisible thing called the electric force field. ... understand electric forces, we have to learn something about charged particles like electrons and protons. Without these charged particles, there can be no electric force fields and thus no electromagnetic waves. What are electrons and protons? An electron is a particle with negative charge and not much mas...

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... the excited state and back again to ground state. The energy released from this is given out as light and not reflected back to the source in anyway. Free radiating waves issued from an atom which have been stimulated to emit radiation are reflected back using reflected surfaces. Light wave-energy is thus reflected back to the source stimulating more atoms ... on the surface f the work-piece. The highly focused, high density melts and evaporates portions of the work-piece in a controlled manner. Types of layers used: Co2(pulsed or continuous waves). Nd:YAG(neodymium:yttrium-aluminum-gar...

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... from one another. To get a closer look of things, everyone used a spectroscope to examine the patterns and colors of the elements based on the rainbow. Essentially, it separates light into waves that we known as colors. A complete mixture of all wavelengths of visible spectrum is known as white light. Spectrums are formed from white lights and frequencies. A white light can be ... elements change from the ground to excited state is from electricity because it charges for an atom when it touches each other. Going from the ground to excited state require heat. In this case, a flame was us...

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... around in small groups In a solid, the molecular bonds are strong and hold the molecules firmly together so that the solid is hard and rigid. Heat is a form of energy The point at which all heat vanishes is called absolute zero The atoms of elements are made up of even smaller particles - electrons, which form the outer shells of each atom, and ... An airfoil works better in water, which is denser than air and therefore gives more lift at lower speed Frees from friction with the water, a hydrofoil can skim over the waves at two or three times the speed of the fastest floating boats ...

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Radiation is energy that comes from a source and travels through some material or through space. Light, heat and sound are types of radiation. The kind of radiation discussed in this presentation is called ionizing radiation because it can produce charged particles (ions) in matter. Ionizing radiation is ... radiation. Ionizing radiation can also be produced by devices such as X-ray machines Characteristics of Gamma Radiation and X-Rays 1. Gamma radiation and X-rays are electromagnetic radiation like visible light, radio waves, and ultraviolet light. These electromagnetic radiations differ o...

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