| 11. | Instead of being smooth, their retina is composed of tiny cups, acting like parabolic mirrors.
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| 12. | Using a parabolic mirror, he would hang contrasting pairs of painted shapes, which rotated freely.
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| 13. | Sound waves may be " viewed " using parabolic mirrors and objects that produce sound.
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| 14. | A parabolic mirror would have varying error of a spherical mirror is uniform in every direction.
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| 15. | The rays then reflect off of a parabolic mirror, which focuses all the rays to a point.
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| 16. | In 1842 it was updated with a colza oil lamp and in 1849 parabolic mirrors were installed.
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| 17. | The observatory originally contained the Rayna Telescope, an f / 4.5 parabolic mirror ground by John Owen.
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| 18. | These consist of two opposing parabolic mirrors, with an opening in the center of the top mirror.
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| 19. | A parabolic mirror is used as the reflector, with a bulb at the focus, in a searchlight.
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| 20. | Its eyes use a combination of photonic crystals, parabolic mirrors and a clustered arrangement of rods and cones.
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