Chapter 30 Crossword


ACROSS
2. _______ primary colors – cyan, magenta, and yellow.

4. _______ coherence – the maintaining of a constant phase difference between waves over time.

5. _______ coherence – the phase difference between points on a wave front remains constant.

7. _______ emission – process by which incident light of the proper frequency triggers emission of light (of the same frequency) by excited atoms.

8. _______ population – the state of having more ions in the upper state (energy level) than in the lower state.

10. _______ medium - a material containing atoms or molecules that can be stimulated to emit light.

11. A coherent, monochromatic (almost), intense light source resulting from stimulated emission.

12. Spatial _______ – the number of lines per unit length of the interference pattern; used to compute resolution requirements for film used in holography.

13. In a laser, the process of supplying energy to the active medium in order to get an inverted population.

DOWN

1. _______ resonator – a structure made of mirrors, with the same optical axis, that reflect light back and forth.

2. Emission of photons through the random de-excitation of excited atoms. 6. _______ primary colors - red, green, and blue.
3. The making of and study of holograms. 9. Photographic recording of the interference pattern produced by a combination of reference and object beams resulting in the formation of an image without the use of a lens.

 
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