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Topic: Science
Number of pages / Number of words: 4 / 847
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chemical pumping systems use the binding energy released in chemical

reactions to raise the lasing material to the metastable state.

2) Optical Cavity:

An optical cavity is required to provide the amplification desired in the

laser and to select the photons which are traveling in the desired direction...


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There

are four types which are solid state, dye, gas and semiconductor.

a. solid state lasers employ a lasing material distributed in a soloid matrix

sytem. Accessory devices which may be internal or external may be used to

convert the output .

b. gas lasers use a gas or a mixture of gas within a tube...


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General points of the essay

The Wonderful World of Chemical Reactions Eastman Chemical Chemical Reactions Your Chemical World Chemical Bonding Chemical Reactions of Copper compounds Chemical Reactions- Sodium Hydroxide Chemical Classes of Chemical Reactions chemical equilibrium chemical structures chemical waste Observing Chemical Reactions (Can be used for assessment layout or for actual prac) The Role Catalysts In Chemical Reactions, Their Importance In Industry The Sequence Of Chemical Reactions

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