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| a bundle of energy that is releaced when an atom loses some energy - |
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| the number of waves(crests or troghts)that pas a point in a given amount of time |
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| the distance between a wave's mid-point and it's crest or troght - the beginning of a crest or trough to the half way point of the other trough or crest |
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| a wave in which the crests and troughts move at right angles to the direction of the wave's travel - waves that travel up and down |
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| the distance between the crests & troughs |
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| allows light to pass through easily |
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| allows light to pass throgh diffusely. Some light goes through, but most of it is reflected. |
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| Does not allow light to pass easily. Reflects most light. |
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| light bouncing off an object |
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| some light gets reflected, and ome light goes through |
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| a lens to focus light on a surface |
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| used to make an obejct larger |
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