concave mirror

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con·cave mir·ror

a spheric reflecting surface that constitutes a segment of the interior of a sphere.
References in periodicals archive ?
The subtly curved mirror was invented by Drexel University mathematics professor Dr.
This is incident on a curved mirror, set at grazing incidence, which collimates the beam in the vertical sense.
NASA realizes the curved mirror that's used to gather light for the telescope is too flat--by 1/50 of a human hair.
The auditorium can act like a curved mirror, concentrating sound in isolated pockets.
Meeting again the young ladies, now all married, inevitably leads to a searching look at their lives (and his own) in a curved mirror of fifteen years of absence.
A lens and curved mirror inside the animal's eye return light - shaping it into a cone and sending it back, nose on, to the light source.
The arch theme continues in the family bathroom with a gorgeous curved mirror above the sink - its edges illuminated by tiny spotlights.
Researchers have now discovered that they can retrieve an image from the light scattered by a rough surface, without using a lens or a curved mirror to focus the light.
A lens and curved mirror inside the animal's eye return light -shaping it into a cone and sending it back, nose on, to the light source.
A lens and curved mirror inside the animal' s eye return the light - shaping it into a cone and sending it back to the light source.
The concept is based on the "anamorphoscope," a curved mirror that un-distorts pictures and re-forms their reflections into normal images.
A lens and curved mirror in the animal's eye return light - shaping it into a cone and sending it back, nose on, to the light source.