| 1. | The arrow at the left represents the light source .
左方的箭号代表光源。 |
| 2. | These rays originate at different points of the source .
这些光线是以光源上的不同点发出的。 |
| 3. | Consider first a light wave spreading out from a point source .
首先考虑一个点光源发出的光波。 |
| 4. | A common laboratory source of light is provided by a mercury arc .
通常的实验室光源选用汞弧灯。 |
| 5. | The condenser is interposed between the light source and the specimen .
在光源和标本之间是聚光镜。 |
| 6. | Most light sources do not radiate equally in all directions .
大多数光源并非在所有各方面都等量地辐射。 |
| 7. | The rubidium lamps and cells are now obtainable only for replacement .
现在能够得到的铷光源和容器仅作备用。 |
| 8. | Light from the source falls on a diffuser d, figure 6.8 .
光线自光源发出后投射到一个漫射器D上，如图68所示。 |
| 9. | The radiation was filtered either by borosilicate glass or by quartz .
辐射光源或用硼硅酸盐玻璃或用石英过滤。 |
| 10. | By far the most nearly monochromatic source available at present is the laser .
目前可用的最接近单色光的光源是激光器。 |
