POLARIZATION OF LIGHT Plane Polarlzed Llght The light ray passes through a filter which has a single.preferred vibration direction Single light ray with light vibrating in all directions. Elllptlcal Polarlzatlon The light ray passes through a fllter which has two vlbratlon dlrectlons,such that CIrcular Polarlzatlon D=14 The llght ray passes through a filter which has two vibration directions,such that D=14
c-axls Only the ray which vibrates parallel to the permitted vibration direction(which in this case is the c-axis)passes through the polar,all vibration directions are absorbed. Direction of Polarization is parallal to the c crystallographlc axls
The reflected ray,with a A single ray of light single vibration direction, vibrating in all directions parallel to the reflecting surface. )<r Reflecting Surface <i=<r
~折射率色散 同一种介质对于不同波长的光，折射率不 同的现象叫做折射率色散。 >介质的折射率值与介质的性质及所有的波 长有关。 >同一种介质，其折射率与入射光波波长成 反比关系，即在紫光中测量的折射率大于 在红光中测得的折射率
➢ 折射率色散 ➢ 同一种介质对于不同波长的光，折射率不 同的现象叫做折射率色散。 ➢ 介质的折射率值与介质的性质及所有的波 长有关。 ➢ 同一种介质，其折射率与入射光波波长成 反比关系，即在紫光中测量的折射率大于 在红光中测得的折射率
~晶体的折射率色散能力，是指晶体在紫光 与红光测定的折射率之差，差值越大，色 散能力越强。 >萤石n紫-n红=0.00868 >金刚石n紫-n红=0.05741
➢ 晶体的折射率色散能力，是指晶体在紫光 与红光测定的折射率之差，差值越大，色 散能力越强。 ➢ 萤石 n紫-n红=0.00868 ➢ 金刚石 n紫-n红=0.05741