Optics: Index of Refraction and Law of Refraction - Snell's Law
         
	    
		    This lesson will discuss the speed that light travels and how it relates to any other medium. This lesson will show and explain how to find the speed of light in water. When light refracts it follows the law of refraction which will be shown and explained. A diagram will be drawn to better understand the concept. 
		    By  Yau Jong Twu