Question

A thin lens has two focal points, one on either side, at equal distances from its center, and should behave the same for light entering from either side. Look through your eyeglasses (or those of a friend) backward and forward and comment on whether they are thin lenses.

a) Eyeglasses behave like thin lenses when viewed backward.

b) Eyeglasses behave differently when viewed backward.

c) Thin lenses cannot be observed by looking through eyeglasses.

d) Thin lenses do not have focal points.

Answer 1

b) Eyeglasses behave differently when viewed backward. When you look through eyeglasses backward, you may notice a difference in the appearance of objects.

Step-by-step explanation:

b) Eyeglasses behave differently when viewed backward. When you look through eyeglasses backward, you may notice a difference in the appearance of objects. Thin lenses, including those in eyeglasses, are designed to correct vision by adjusting the path of light entering the eye. However, when you view them backward, the corrective properties are not aligned with your eyes, leading to distortion. This is because eyeglasses are specifically designed for the direction of light entering the eyes, and their effectiveness is compromised when viewed in reverse. Therefore, option b accurately reflects the change in behavior observed when looking through eyeglasses backward.