from Fundamentals of Physics 7ed Q8 In figure 34-25, stick figure O stands in fr
ID: 1699311 • Letter: F
Question
from Fundamentals of Physics 7edQ8
In figure 34-25, stick figure O stands in front of a thin symmetric lens that is mounted within the boxed region; the central axis through the lens is shown. the four stick figures I1 to I4 suggest general locations and orientations for the images that might be produced by the lens. (the figures are only sketched in; neither their heights nor their distances from the lens are drawn to scale.)
(a) which of the stick figures could not possibly represent images? of the possible images, (b) which would be due to a converging lens, (c) which would be due to a diverging lens, (d) which would be virtual, and (e) which would involve negative magnification.
In the figure, O is to the left of the lens. Possible images I1 and I2 are to the left of the lens, I3 and I4 are to the right. I1 and I3 have the same orientation as O, and I2 and I4 are inverted.
Explanation / Answer
(a) stick figures I2 and I3 does not represent the iamges . (b) I4 is due to converging lens as it produces the real and inverted images and the image is opposite to the object . (C) I1 is due to diverging lens . Irrespecitve of the position of the object the image formed by a concave lens is always virtual, erect with respect to object , smaller than the object and between optic centre and the focus. (d) Image I1 is virtual . (e) Image I4 involves negative magnification as it is inverted with respect to the object . Note: Image I1 could be a virtual image due convex lens also if it is behind the object . But it can not be treated like that because I1 is infront of the object so it is strictly due to a concave lens.
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