1.Two slits, seperated by d=0.45mm, are illuminated with light of wavelength
560 nm. The pattern is viewed on a screen 2.5m from the slits.(a)What is
the phase different ψ at a point 2mm from the central bright fringe.and
(b)what is the intensity at a point 2mm from the central bright fringe.
2.Calculate the spacing between the bright fringe of yellow light of
wavelength 600nm. The slit seperation is 0.8mm, and the screen is 2m from
the slit.
3.请叙述“费马原理”。
4.试用“费马原理”证明“折射定律”。
5.请叙述“雷射(LASER)”的原理。
6.请列出三种液晶的种类(以结构来分)。
7.请说明LCD中“偏光板”的构造以及基本作用，并说明液晶在这之中的角色。