Which one of the following accurately describes a proper use of eyeglasses?

a. using converging lenses to a nearsighted person by moving the image from in front of the retina to the retina
b. using diverging lenses to a nearsighted person by moving the image from in front of the retina to the retina
c. using converging lenses to a nearsighted person by moving the image from behind the retina to the retina
d. using diverging lenses to a farsighted person by moving the image from behind the retina to the retina

B. Using diverging lenses to help a nearsighted person by moving the image from in front of the retina to the retina

Explanation:

To see an object, the light rays coming from the object must converge on the retina. Nearsightedness or myopia is the condition where the rays get converged before (or in front of) the retina. Thus the image on the retina will not be clear and the observer will not be able to see nearby objects.

To correct this we use a diverging lens which shifts the converging point or focus to the retina.

! 55 !  

write a paragraph or story to explain the transformation between potential and kinetic energy as shown in your picture or model.  

you should have at least 5 complete sentences with a main idea and supporting details.  

you must include the following words:  

potential energy

kinetic energy

mechanical energy

conservation of energy

dude, this is hard lol : ))