| 31. | The refractive index is basic to the science of optics.
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| 32. | A refractometer is the instrument used to measure refractive index.
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| 33. | D usually denotes the refractive index at the nm wavelength.
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| 34. | The scale can be calibrated in Brix or refractive index.
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| 35. | Refractive index is a measure of the degree to which a medium bends light.
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| 36. | Chromatic aberrations are caused by lens's refractive index with wavelength.
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| 37. | This lowers the refractive index, defocusing the propagating light beam.
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| 38. | The larger the refractive index, the larger the deviation angle.
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| 39. | They are attractive here for their small refractive index nonlinearity.
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| 40. | Lead has a high refractive index; it makes glass sparkle,
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