| 11. | In radio astronomy the air mass ( which influences the optical path length ) is not relevant.
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| 12. | This in turn shifts the band edge and changes the optical path length in the lasing cavity.
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| 13. | Today, acquisition is usually done using a CCD camera mounted in the optical path of the microscope.
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| 14. | The expression for the optical path length can also be written as a function of the optical momentum.
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| 15. | The gradient theorem can then be applied to the optical path length ( as given above ) resulting in
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| 16. | An additional photomultiplier system viewed a beam splitter in the optical path and was used as a star mapper.
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| 17. | The amount of light absorbed in each spectral line increases with the number of molecules along the optical path.
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| 18. | When a human or object moves into the optical path, the reflected beam bounces back from the object.
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| 19. | Where is the optical path length, is a molar absorbance at unit path length and is a concentration.
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| 20. | Consequently, the ability to define an optical path is 1000 times better when using beam profilers over irises.
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