This can be in the form of old coins or a bagua (a convex or concave mirror
, available in most Chinese souvenir shops, believed to reflect back negative feng shui energy).
T]he concave mirror
is the corrector (of chromatic aberration) and the lens is the objective.
In a long pleated robe she then knelt solemnly to the ground and lit the torch within a few seconds using a concave mirror
to catch the sun's rays.
The concave mirror
magnifies the HUD display creating a larger virtual image in front of the vehicle.
A 'real image' of a lamp inside the box was being produced by a concave mirror
It seems that India is looking at itself in a concave mirror
and what it sees is too big.
Astronomical telescopes come in three basic types: refractors, which have a large lens up front to gather and focus the light; reflectors, which have a concave mirror
at the bottom of the tube to do the same job, and compound (or "catadioptric") scopes that combine lenses and mirrors for a more compact design.
It follows a fire in Linthwaite, when the concentration of the sun's rays by a magnifying concave mirror
set a box of Christmas decorations alight.
One, Bracket 6, was hinged at right angles to the wall, as though a blank window or door, while the second, Bracket 7, was curled to create a concave mirror
nestled inside a smaller open box frame.
On a hot autumn day, Greek actress Ino Menegaki, playing a high priestess, lit the torch in seconds as the sun's rays bounced off a concave mirror
at the birthplace of the ancient Olympics, a ritual first established for the 1936 Berlin Games.
6 shows their intensity and phase profiles at the concave mirror
The two photodiodes are oriented relative to the entrance aperture so that the principal ray of incident radiation strikes each diode once at a 45[degrees] angle of incidence and then reflects from the concave mirror
back onto the photodiodes in reverse order.