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一 填充题1 暗场照明的主要附件有————、————和———.2 暗场照明的主要优点有————、————和————等.3 暗场照明时可看到非金属夹杂物的————和————.4 常运用偏光装置来观察金属的————以及鉴别金属中的————.5 自然光通过起偏元件后,可以得到只在一个方向振动光波,称为————.当起偏振和捡偏振器的振动轴相互垂直时,入射偏振光不能通过捡偏振器,观察视域中一片漆黑,此即为————现象.6 Zn是六方晶体,用偏光观察时,可以看到晶粒呈现不同的明暗衬度.当载物台作为360°旋转时,各晶粒的亮度不会发生————次明、暗交变.
A fill-in problem 1 dark field lighting main attachments ----, ---- and ---. 2 The main advantages of dark field lighting ----, ---- and ---- and so on.3 Dark field lighting can be seen when the non-metallic inclusions ---- and ---- 4 Often use the polarizing device to observe the metal ---- and identify the metal ---- 5 Natural light through the partial Components, you can get only one direction of vibration light wave, called ---- When the polarization and pick up the polarizer vibration axis perpendicular to each other, the incident polarized light can not pick up the polarizer, the viewing area of a dark, this Is the phenomenon ---- 6 Zn is a hexagonal crystal, observed with polarized light, you can see the grain showed a different light and shade contrast.When the stage as a 360 ° rotation, the brightness of the grain does not occur - --- Sub-Ming, dark change.