| 21. | The viscoelastic properties of pitch make it the vehicle of choice for polishing high-quality optical lenses and mirrors.
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| 22. | Transmission electron microscopes use electron optical lenses are analogous to the glass lenses of an optical light microscope.
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| 23. | It features a 10X optical lens.
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| 24. | The twin optical lenses that pressed up against my eyes were reminiscent of childhood trips to the optician.
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| 25. | A, or B bombsight was issued together with the BZA-2 aperture ( a modernised optical lens system ).
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| 26. | Petzval's largest contributions to optics are his theoretical bases for the construction and correction of optical lens systems.
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| 27. | The company, which makes parts for television and computer monitors, as well as optical lenses, will keep its name.
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| 28. | Their concave fronts are as precisely ground as modern optical lenses, although their backs were left rough and uneven.
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| 29. | The principal difference between the lens of the eye and an ordinary optical lens is that the former is flexible.
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| 30. | With conventional optical lenses, the far field is a limit that is too distant for evanescent waves to arrive intact.
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