Consider an extended object placed to the left of a bi-convex lens with focal length of 10 [cm] as shown. (Note: Figure not drawn to scale) 10 If the object is placed 5 [cm] to the left of the lens, where will the image be located? Select the correct description of the image. O A 10 [cm]-Demagnified, Virtual, Upright O B. -1/3 [cm] - Magnified, Virtual, Inverted O C. -5 [cm]-Demagnified, Real, Inverted OD. -10 [cm] - Magnified, Virtual, Upright

Consider an extended object placed to the left of a bi-convex lens with focal length of 10 [cm] as shown. (Note: Figure not drawn to scale) 10 If the object is placed 5 [cm] to the left of the lens, where will the image be located? Select the correct description of the image. O A 10 [cm]-Demagnified, Virtual, Upright O B. -1/3 [cm] - Magnified, Virtual, Inverted O C. -5 [cm]-Demagnified, Real, Inverted OD. -10 [cm] - Magnified, Virtual, Upright

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter2: Geometric Optics And Image Formation

Section: Chapter Questions

Problem 64P: Two convex lenses of focal lengths 20 cm and 10 cm are placed 30 cm apart, with the lens with the...

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Two convex lenses of focal lengths 20 cm and 10 cm are placed 30 cm apart, with the lens with the longer focal length on the right. An object of height 2.0 cm is placed midway between them and observed through each lens from the left and from the right. Describe what you will see, such as where the image(s) will appear, whether they will be upright or inverted and their magnifications.
At what distance is an image always located: at do,di, or f?
Let objective and eyepiece of a compound microscope have focal lengths of 2.5 cm and 10 cm, respectively and be separated by 12 cm. A 70- mobject is placed 6.0 cm from the objective. How large is the virtual image formed by the objective-eyepiece system?
What is meant by a negative magnification? What is meant by a magnification whose absolute value is less than one?
If you want your microscope or telescope to project a real image onto a screen, how would you change the placement of the eyepiece relative to the objective?
Draw rays to scale to locate the image at the retina if the eye lens has a focal length 2.5 cm and the near point is 24 cm. (Hint: Place an object at the near point.)
A far-sighted person has a near point of 100 cm. How far in front or behind the retina does the image of an object placed 25 cm from the eye form? Use the cornea to retina distance of 25 cm.
For a converging lens of focal length f, where would you place the object to obtain an image as far away from the lens as possible? How large would the image be?
What is the magnification of an astronomical telescope whose objective lens has a focal length of 78 cm and whose eyepiece has a focal length of 2.8 cm? The telescope is set so the image of the eyepiece is at infinity (so the viewer’s eye is “relaxed”). What is the overall length of the telescope? Sketch the situation, defining all your variables Please sketch it, this is most important.
Consider a thin lens L1 with a focal length of -10cm, and a second lens L2 with a focal length of +5cm. (a) If the two lenses are placed very close together, but with an air gap between them, and an object is placed 25 cm from the lens combination, where is the location of the image? Describe the image: real or virtual, inverted or erect, and magnified or shrunk. (b) If lens L2 is now moved 10 cm away from lens L1, where is the location of the image? Again describe the image: real or virtual, inverted or Erect, and magnified or shrunk.
You are imaging a pencil through a thin, converging lens as shown in the image below. If p (the distance from the object to the center of the thin lens) is 8.15m and the focal length of the thin lens is 0.42m, how far away (in meters) from the center of the thin lens is the real image located (the real image will be on the right-side of the lens in this particular example illustrated below)?
An object is placed 10 m before a convex lens with focal length 5.2 m. Another concave lens is placed 15.6 m behind the first lens with a focal length -7.2m (see the figure below). Note: Make a ray diagram sketch in order to check your numerical answer. At what distance is the first image from the first lens? Answer in units of m. What is the magnification of the first image? At what distance is the second image from the second lens? Answer in units of m. What is the magnification of the final image, when compared to the initial object?