11. The mirror landing aid was a gyroscopically-controlled concave mirror on the port side of the flight deck. 12. In the sign convention used in optical design, a concave mirror has negative radius of curvature, so 13. :It appears to me that this is asking about the angle of reflection in the concave mirror . 14. Small concave mirrors show up in Flemish paintings and German engravings of the 15th and 16th centuries. 15. What about a concave mirror ? ( talk ) 22 : 15, 2 December 2009 ( UTC) 16. People have been projecting images using concave mirrors and pin-hole cameras ( camera obscura ) since Roman times. 17. With hand held lamps, a concave mirror is tilted by a trigger to focus the light into pulses. 18. To study Croce through its medium is like studying the face of a man in a concave mirror . 19. One of the girls stepped forward to light the flame from the sun's rays in a concave mirror . 20. A few decades later, Isaac Newton invented the reflecting telescope, which uses a concave mirror to focus incoming light.
