154 Common Science 



bend the lines together, and that the lens in the eye 

 bends them farther together; so they cross sooner, and 



FIG. 84. Diagram of a microscope. 



the image is larger. Figure 83 shows more of the lines 

 drawn in. 



The two important points to notice are these : First, 

 the magnifying glass is too close to the eye for the light 

 to be brought to a focus before it reaches the eye ; the 

 light is bent toward a focus, but it reaches the eye 

 before the focus is formed. The focus is formed for 

 the first time on the retina itself. Second, the magnify- 

 ing glass bends the light on its way to your eye so that 

 the light crosses sooner in your eye and spreads out 

 farther before it comes to a focus. This forms the 

 larger image, as you see in the simple diagram, Figure 82. 



FIG. 85. This is the way a concave mirror forms a magnified image. 



