Understand the basics of the electromagnetic (EM) spectrum of radiation (or light) • Define the relationship between light's frequency and its wavelength The Fundamentals of the Electromagnetic Spectrum Electromagnetic radiation refers to the propagation of energy in the form of waves or particles...
Refraction • Refraction of EMR is dependent on wavelength as can be seen by the prism example below. Source By using a glass prism, white light can be spread by refraction into a spectrum of its composite colours. All wavelengths of EMR can be re- fracted by using the proper mate- ...
P值<0.05被认为是显著的。Emmetropia,定义为>-0.5D和<+0.5D的屈光状态,在36%的成年人身上发现了,43%的老年人,和38%的老年患者。1%的成年人出现屈光参差,当两只眼睛的屈光力不同≥1.0近视≤-0.5D和远视≥0.5D时,在23%和41%的成人眼球中发现了9.5%的老年犬和5.5%的老年犬以及24%和33%的老年犬和15%和...