WHAT ARE SOME OF THE PROPERTIES OF LIGHT? 141 



refraction. We appear to see objects in the direction in 

 which the light enters our eyes. Consequently if the rays 

 of light are bent before reaching our eyes, there is an 

 apparent displace- 

 ment of the body. 

 For this reason water 

 in a pond appears to 

 be more shallow than 

 it really is. In other 

 words, the earth at 

 the bottom of the 

 pond looks to be 

 nearer the surface 

 and has often de- 

 ceived adventurous 

 boys and girls who 

 could not swim. Fish in the water may not be in the 

 exact position in which you are looking when you see 

 them. It is refraction that bends the rays of sunlight 

 in a burning glass or lens and that makes letters look 

 larger in a reading glass. 



Passage of light through plate glass. Why is 

 only one of the rays bent ? 



SELF-TESTING EXERCISE 



Select from the following list those words which best fill the blank spaces 

 in the sentences below and arrange the words in proper numerical order. 

 A word may be used more than once. 



reflection 



refraction 



reflected 



bent 



send 



bend 



left 



right 



opaque 



transparent 



luminous 



light 



dark 



equals 



translucent 



diffused 



same 



front 



back 



inside 



outside 



convex 



concave 



plane 



smooth 



directions 



angle 



image 



angle, 



When a beam of light comes to a window at a (1)_ 



some of the light is (2) back in the direction from which the 



light comes. An (3) body does not transmit light. Frosted 



