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it remains paraboloidal, but its focal length and other parameters change as it tilts.
it remains paraboloidal, but its focal length and other parameters change as it tilts.
Ultimo aggiornamento 2016-03-03
Frequenza di utilizzo: 1
Qualità:
paraboloidal reflectors that have their centres of mass coincident with their focal points are useful.
paraboloidal reflectors that have their centres of mass coincident with their focal points are useful.
Ultimo aggiornamento 2016-03-03
Frequenza di utilizzo: 1
Qualità:
the mirror is never exactly paraboloidal, but it is always close enough for cooking purposes.
the mirror is never exactly paraboloidal, but it is always close enough for cooking purposes.
Ultimo aggiornamento 2016-03-03
Frequenza di utilizzo: 1
Qualità:
paraboloidal reflectors generate high temperatures and cook quickly, but require frequent adjustment and supervision for safe operation.
paraboloidal reflectors generate high temperatures and cook quickly, but require frequent adjustment and supervision for safe operation.
Ultimo aggiornamento 2016-03-03
Frequenza di utilizzo: 1
Qualità:
this rotation technique is sometimes used to make paraboloidal mirrors for astronomical telescopes, and has also been used for solar cookers.
this rotation technique is sometimes used to make paraboloidal mirrors for astronomical telescopes, and has also been used for solar cookers.
Ultimo aggiornamento 2016-03-03
Frequenza di utilizzo: 1
Qualità:
although paraboloidal solar cookers can cook as well as or better than a conventional stove, they are difficult to construct by hand.
although paraboloidal solar cookers can cook as well as a conventional oven, they are difficult to construct.
Ultimo aggiornamento 2016-03-03
Frequenza di utilizzo: 1
Qualità:
if the material solidifies while it is rotating, the paraboloidal shape is maintained after the rotation stops, and can be used to make a reflector.
if the material solidifies while it is rotating, the paraboloidal shape is maintained after the rotation stops, and can be used to make a reflector.
Ultimo aggiornamento 2016-03-03
Frequenza di utilizzo: 1
Qualità:
=== paraboloidal reflectors ===paraboloids are compound curves, which are more difficult to make with simple equipment than single curves.
=== paraboloidal reflectors ===paraboloids are compound curves, which are more difficult to make with simple equipment than single curves.
Ultimo aggiornamento 2016-03-03
Frequenza di utilizzo: 1
Qualità:
it is possible to use two parabolic troughs, curved in perpendicular directions, to bring sunlight to a point focus as does a paraboloidal reflector.the incoming light strikes one of the troughs, which sends it toward a line focus.
it is possible to use two parabolic troughs, curved in perpendicular directions, to bring sunlight to a point focus as does a paraboloidal reflector.
Ultimo aggiornamento 2016-03-03
Frequenza di utilizzo: 1
Qualità:
a scheffler cooker (named after its inventor, wolfgang scheffler) uses a large ideally paraboloidal reflector which is rotated around an axis that is parallel with the earth's using a mechanical mechanism, turning at 15 degrees per hour to compensate for the earth's rotation.
a scheffler cooker (named after its inventor, wolfgang scheffler) uses a large ideally paraboloidal reflector which is rotated around an axis that is parallel with the earth's using a mechanical mechanism, turning at 15 degrees per hour to compensate for the earth's rotation.
Ultimo aggiornamento 2016-03-03
Frequenza di utilizzo: 1
Qualità: