1178 CHAPTE R 37 Â¥ Interference of Light W aves. source produces the original light beam and the two slits ser ve only to separate the. original beam into two parts (which, after all, is what is done to the sound signal from. the side-by-side loudspeakers at the end of the preceding section).
It was after using a camera lucida in 1833 that the the pioneer of photography William Fox Talbot began his attempts to fix images chemically. David Hockney has speculated on how great artists have used the camera lucida in his book 'Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters'. (for a very brief summary of some of these ideas, see his article in RA Magazine from Summer 1999).
Through his friendship with Italian photographer Tina Modotti, Ãlvarez Bravo met the American photographer Edward Weston and many of the leading artists of the Mexican renaissance, including Diego Rivera, Frida Kahlo, Rufino Tamayo, David Alfaro Siqueiros, and JosÃ© Clemente Orozco.