372 REFLECTION 



is reflected to D ; and the barb B strikes the water at 

 E, and is reflected to C. 



If a spectator stands at G, he will see the reflected 

 lines C E and D F, produced as far as G. 



It is very plain that the more elevated object A will 

 strike the water, and be projected from it more perpen- 

 dicularly than the point B, and therefore the shadow 

 will seem inverted. 



Q. When we see our SHADOW in WATER, why 

 do ive seem to STAND on our HEAD ? 



A. Because the line of the angle of 

 incidence is always equal to the line and 

 angle of reflection. 



Suppose our head to be at A, and our feet at B ; then 

 the shadow of our head will be seen at D, and the 

 shadow of our feet at C. (See last figure.} 



Q. Why do WINDOWS seem to BLAZE at SUN- 

 RISE and SUN-SET ? 



A. Because glass is a good reflector 

 of light ; and the rays of the sun (striking 

 against the window glass) are reflected, 

 or thrown back. 



Q. Why Jo NOT windows reflect the NOON-DAY 

 rays also ? 



A. They do, but the reflection is not 

 seen. 



Q. IVhy is the reflection of the RISING and 

 SETTING sun seen in the window, and NOT that of the 



NOON-DAY SUn? 



A. As the angle of incidence always 



