An object is in front of a converging lens with a focal length of 20.0 cm. The image seen has a magnification of -2.90. (Include the sign of the values in your answern (a) How far is the object from the lens? cm (b) If the object has a height of -18.0 cm because it points below the principal axis (it is inverted), what is the image height h,? cm

An object placed 15 cm to the left a convex lens produces and image 31 cm on right side of the lens. What is the focal length of this lens? Only numerical answer required. No need for units.

An illuminated slide is held 60 cm from a screen. How far from the slide (between the slide and the screen) must a lens of focal length 5.4 cm be placed to form an image of the slide's picture on the screen? (Give the smaller of the two possible answers.) Number i Units eTextbook and Media >

A simple compound microscope with an overall magnification of -850 has an objective that magnifies by -250.   Part (a)  What is the magnification of the eyepiece? Part (b)  If there is another objective that can be used, having magnification of -400, what other total magnification is possible?

Need help:. You have an object 16.0 cm away from a diverging lens of focal length f = –16.0 cm. From this information, determine the magnification of the lens. (hint: work backwards from magnification to determine the approach to this problem)

A myopic person sees that her contact lens prescription is −4.25 D. What is her far point in centimeters? cm

1) Calculate the magnification of the 36-in refractor at Lick Observatory on Mount Hamilton near San Jose, California. The focal lenght of the objective lens is 17.37m, and the focal lenght of the eyepiece is 22 mm. (Express your answer to three significant figures.) 2) What is the significance of the negative sign in the magnification equation?       a) The image is inverted when viewed in the eyepiece.        b) The image is upright when viewed in the eyepiece.

please answer vv

A microscope has an eyepiece with a focal length of 18.0 mm, and an objective with a focal length of 8.00 mm. Thelenses are separated by 19.7 cm. A) If the final image is located infinitely far away, where is the object located? B) What is the total magnification?

(Dove Prism) A new type of prism inverts an image that comes in through one end (see Figure 1). The prism will be shaped like a trapezoid with a square cross-section and sides cut at a 45° angle, and that the prism will be made of a plastic called BK7 that has an index of refraction of 1.517. Decide on the dimensions of the prism in order to maximize the size of the image that can be inverted (see incoming/outgoing rays in the side view in Figure 2). How long (length B in Figure 1) should the prism be in terms of its height (length A in Figure 1)? What happens to an image that enters the prism on one side of its long face (see figure 3)? Make a drawing tracing the path of rays 4, 5, and 6 in figure 3 to find out. Figure 1 Figure 2 1 3 2 45° 3 1 Figure 2 Figure 3 45° Figure 3 4 5 6