Question

Thin lenses lab. Plz answer

How does the size of the image change when you move the object from focal point (do-f) towards the converging lens (do - 0)? Your Answer:

Answer 1

• If the object is placed at the focal point (d. -4) of a convenging (coner If the object is placed at the focal point (do=f) of a converging (convex) lens, then the image will be formed at infinity and the magnification will be infinite. de I++, - } } $ $ = 0 (id:--4) de = oo and magnification, ma St = 3 + 4 ü or, f do the than 1 in case. So, the image is highly enlanged. Now if the object is moved from focal point towards lens (do ->o) then the magnification factor, m decreases from a although the magnification is greater this so, the size of the image decreases when we move the object from focal point towards the lens. But, the size of the image is greater than the size of the object. This is a virtual and ventual and erect image. conrex lens, virtual image is formed only when the object is between the lens and focal point. • For a Image I Ę object Fa

Lens Do of tot + di do So, the • If the object is placed at the focal point of a diverging (concave) lens, then the image will be formed at a distance of half the focal length in front of the and magnification will be 1 / 2 + or her & + 1 / 1 -f -f 1 = -238 doof di = -4/2 and magnification, m = image is diminished. Now if the object is moved from focal point towards the lens (do->0) then the magnification facton, m inerea ses from 0.5 although the magnification factor less than the size of the image increases when we more the object from focal point towards the lens. But, the size of the always less than the size of the object. a virtual and enect image. concave lens produces an erect ventual image smaller than the object always. And the image is always formed inside the focal length of the lens. is one. so, image is • This is 나 Object image Object between focal point and lens.

object f image object outside focal point so for any position of the object concave lens produces enect vintual image. an