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A convex mirror diagram showing the focus, focal length, centre of curvature, principal axis, etc. A convex mirror or diverging mirror is a curved mirror in which the reflective surface bulges towards the light source. [1] Convex mirrors reflect light outwards, therefore they are not used to focus light.
Dielectric mirrors are also used to produce ultra-high reflectivity mirrors: values of 99.999% or better over a narrow range of wavelengths can be produced using special techniques. Alternatively, they can be made to reflect a broad spectrum of light, such as the entire visible range or the spectrum of the Ti-sapphire laser.
If the collector base reverse bias on Q 2 is increased by increasing the applied voltage V A, the current in Q 2 increases, increasing V 2 and decreasing the difference V 1 − V 2 entering the op amp. Consequently, the base voltage of Q 2 is decreased, and V BE of Q 2 decreases, counteracting the increase in output current.
Blowing over a curved piece of paper does not demonstrate Bernoulli's principle. Although a common classroom experiment is often explained this way, [ 442 ] Bernoulli's principle only applies within a flow field, and the air above and below the paper is in different flow fields. [ 443 ]
A BJJ black belt with a red bar indicating first degree. The black belt in martial arts does not necessarily indicate expert level. It was introduced for judo in the 1880s to indicate competency at all of the basic techniques of the sport. Promotion beyond 1st dan (the first black belt rank) varies among different martial arts.
Mirrors 2 is a 2010 American supernatural horror film. It is a stand-alone sequel to the 2008 film Mirrors , not featuring any of the cast and crew from the original film. Released by 20th Century Fox in direct-to-video format, the film is written by Matt Venne and is directed by Víctor Garcia .