| 31. | A tungsten lamp's colour is typically controlled by inserting one or more gels ( filters ) into its optical path.
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| 32. | As this calculation demonstrates, Snell's law is equivalent to vanishing of the first variation of the optical path length.
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| 33. | This corresponds to the parabola-shaped optical path difference between two spherical wavefronts that are tangent at their radii of curvature.
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| 34. | Increasing the thickness of KBr in the beam increases the optical path because the refractive index is higher than that of air.
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| 35. | The TriDAR combines a high precision, short range triangulation sensor with a long range LIDAR sensor into the same optical path.
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| 36. | With the aid of the flow of the cells, there is a resultant force that is directed along that preferred optical path.
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| 37. | The basic concept is to introduce a split element into a telescope's optical path so as to produce a double image.
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| 38. | "Optical path difference " corresponds to the phase shift which happens between two previously coherent sources when passed through different mediums.
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| 39. | By shifting the arrangement of the optical lattice point, there is a preferred optical path where the optical forces are dominant and biased.
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| 40. | Schlieren optics show changes in the condition of a test area of space in the optical path, even when it remains fully transparent.
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