Radiant Heat and Light 



135 



FIG. 64. How should the mirror be placed? 



The boy who 

 drew the second 

 said: " No, the 

 light would just go 

 back to him again. 

 The mirror must 

 slant so that the 

 light that strikes 

 it at a slant will be 

 reflected to your 

 eye at the same 

 slant." 



" How could it 

 get to your eye at 

 all," the third boy 

 said, " if the mir- 

 ror didn't face 

 you? You've got 

 to have the mirror 

 reflect right down 

 toward your face. 

 Then all the light 

 that strikes it will 

 come down to 

 you." 



Which arrange- 

 ment would work ? 



Inference Exercise 

 Explain the following : 



191. Your hands do not get wet when you put them into mercury. 



192. When beating hot candy, we sometimes put it in a pan of 



water. 



193. Electric stoves frequently have bright reflectors. 



194. We put ice in the top of a refrigerator. 



195. You can jack up the back part of an automobile when you 



could not possibly lift it up. 



