虚像
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(虚(xū )像(xiàng ),虚(xū )像(xiàng ))
光(guāng )学(xué )名(míng )词(cí )。物(wù )体(tǐ )发(fā )出(chū )的(de )光(guāng )线(xiàn ),经(jīng )反(fǎn )射(shè )或(huò )折(shé )射(shè )后(hòu ),如(rú )为(wéi )发(fā )散(sàn )光(guāng )线(xiàn ),则(zé )它(tā )们(men )反(fǎn )方(fāng )向(xiàng )延(yán )长(zhǎng )线(xiàn )相(xiàng )交(jiāo )时(shí )所(suǒ )形(xíng )成(chéng )的(de )像(xiàng )称(chēng )“虚(xū )像(xiàng )”。虚(xū )像(xiàng )不(bú )能(néng )显(xiǎn )映(yìng )在(zài )屏(píng )幕(mù )上(shàng ),也(yě )不(bú )能(néng )使(shǐ )照(zhào )相(xiàng )底(dǐ )片(piàn )感(gǎn )光(guāng ),但(dàn )可(kě )用(yòng )人(rén )目(mù )观(guān )察(chá )。如(rú )放(fàng )大(dà )镜(jìng )中(zhōng )观(guān )察(chá )到(dào )的(de )像(xiàng )就(jiù )是(shì )虚(xū )像(xiàng )。
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