[填空题]
Reading glasses use conver8c8: u(poavnuujc5 kiv f65 l*gin r o7 1;3)ich4e+h-myhk t;ar7scldugg lenses. A simple magnifier is also a converging lens. Are reading glasses the7y;)l rk -e1a+ h;uior 7h4c3dsmhcgtrefore magnifiers? Discuss the similarities and differences between converging lenses as used for these two different purposes.
参考答案: yes
本题详细解析: Yes, reading glasses are magnifiers. Similarity: they are both converging lenses. Difference: glasses try to put the image of the object at a person’s near point so it is clear to see, while a magnifying lens tries to put the image of the object at infinity so it is incredibly large and it subtends as large of an angle as possible on our retina. Thus, the main difference is that the glasses need to have the object closer to the lens than the focal point, while the magnifying lens needs to have the object directly at the focal point.
