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photoacoutics effect
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photoacoutics effect
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光声效应
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photoacoutics effect
光声效应
物质受到周期性强度调制的光照射时吸收光能而被周期性加热,物质局部热胀冷缩出现周期性应变(应力)变化,产生频率与光调制频率相同的声波的现象。
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