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).
Frida Kahlo was a renowned Mexican artist, well known for her self-portraits. Diego Rivera (m. Frida Kahlo was a great Mexican painter best known for her self-portraits. She combined traditional Mexican folk art with surrealism, making her paintings a symbolic form of self-expression. A self-taught artist, painting was not her first choice as a career, until a tragic incident changed her destiny and left her severely injured.