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.

your answer would be fusion

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask