http://hk.knowledge.yahoo.com/question/question?qid=7011032700146
你話In the actual fact, this assumption is made because the slits must behave like two coherent "point sources" (a point source has no dimension, in theory).
想請問咩叫a point source has no dimension?
仲有唔該答答呢呢條丫,唔該!
http://hk.knowledge.yahoo.com/question/question?qid=7011032700649
更新1:
同埋你果個animation呢,個wavelength 既order係10^-9 and slit widht 係10^-3,但係點解你會話slit width to as small as you could (down to 0.1 micrometer). When it is much smaller than the wavelength (550 micrometer), 同埋如果係咁,個slit width 最細都大佢幾十-百倍喎,點解會咁?
更新2:
SORRY,order果度我錯左,唔好意思