REFLECTION OF LIGHT. 



small angle with the surface, be reflected from the water, leaping from point 

 to point of the surface, and affording the sport which boys call " duck and 

 drake." 



The laws which govern the refraction of light through transparent media 

 show that when a ray strikes the transparent surface of a medium more rare 

 than that through which it has passed, it cannot penetrate that surface, but will 

 be reflected, unless its angle of obliquity exceed a certain magnitude. This 

 mode of reflection is the most perfect with which we are acquainted, and is 

 resorted to with great advantage in some optical instruments. 



