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These optical fold mirrors are not to be confused with the observatory's deployable primary mirrors, which are folded inward to fit the telescope within the launch vehicle's payload fairing; when deployed, these segments are part of the three-mirror anastigmat design's primary element and don't serve as fold mirrors in the optical sense.
Folding chairs also were used as grave goods in the richest graves. A folding chair of ebony and ivory with gold fittings was found in Tutankhamun's tomb in Egypt. Folding chairs were used in Ancient Egypt, Minoan Greece, and Ancient Rome, as well as during the Nordic Bronze Age and the Medieval Period. The frame was mostly made of wood, and ...
A very complex dielectric mirror can reflect up to 99.999% of the light incident upon it, for a narrow range of wavelengths and angles. A simpler mirror may reflect 99.9% of the light, but may cover a broader range of wavelengths. Almost any dielectric material can act as a perfect mirror through total internal reflection. This effect only ...
A mirror reflecting the image of a vase A first-surface mirror coated with aluminium and enhanced with dielectric coatings. The angle of the incident light (represented by both the light in the mirror and the shadow behind it) exactly matches the angle of reflection (the reflected light shining on the table). 4.5-metre (15 ft)-tall acoustic mirror near Kilnsea Grange, East Yorkshire, UK, from ...
The mirror selector usually has a neutral position with no mirrors selected, to prevent accidental changes of the view. The position of the selected mirror is adjusted by a joystick, a four-way knob, or other type of position control. [3] [4] In luxury designs, power mirror settings may be memorized together with settings of power seats. [4]