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).
1 Frida Kahlo Quotes Frida Kahlo was a Mexican painter famous for her many self-portraits. 2  Born in 1907, she was involved in a trolley accident at the age of 18 that left her with pain and disabiâ¦. 3  Frida Kahlo's The Broken Column. 4  In 1944, Frida Kahlo painted The Broken Column..