An object is placed 18.0 cm. to the left of the (a) convex lens and (b) the concave lens shown below. Both lenses have a refractive index n = 1.50. The radii of curvature of each lens is shown – just the values, though, with no signs. Find the focal length of each lens and teh location of the image for each lens. (not a double lens problem each lens is separate from the other). R1 = 10cm R2 = 15cm for both lenses

An object is placed 18.0 cm. to the left of the (a) convex lens and (b) the concave lens shown below. Both lenses have a refractive index n = 1.50. The radii of curvature of each lens is shown – just the values, though, with no signs. Find the focal length of each lens and teh location of the image for each lens. (not a double lens problem each lens is separate from the other). R1 = 10cm R2 = 15cm for both lenses

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A thin plastic lens with index of refraction n = 1.69 has radii of curvature given by R, = -11.5 cm and R, = 30.0 cm. HINT (a) Determine the focal length in cm of the lens. cm (b) Determine whether the lens is converging or diverging. O converging O diverging Determine the image distances in cm for object distances of infinity, 7.00 cm, and 70.0 cm. (c) infinity cm (d) 7.00 cm cm (e) 70.0 cm cm
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A thin plastic lens with index of refractionn = 1.69 has radii of curvature given by R, = -11.5 cm and R, = 30.0 cm. HINT (a) Determine the focal length in cm of the lens. -12.05 cm (b) Determine whether the lens is converging or diverging. O converging O diverging Determine the image distances in cm for object distances of infinity, 7.00 cm, and 70.0 cm. (c) infinity -12.05 By the sign conventions for thin lenses, the negative image distances indicate the images are formed in front of the lens (on the same side as the object). cm (d) 7.00 cm cm (e) 70.0 cm cm
What power of spectacle lens is needed to correct the vision of a nearsighted person whose far point is 30.0 cm? Assumethe spectacle (corrective) lens is held 1.50 cm away from the eye by eyeglass frames.
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(a) Where does an object need to be placed relative to a microscope for its 0.500-cm focal length objective to produce a magnification of -10? (Give your answer to at .least.three..decimal places.) 0.556 "How are the object and image distances related to the magnification and focal length of a lens? cm (from the objective lens) (b) Where should the 5.00-cm focal length eyepiece be placed to produce a further fourfold (4.00) magnification? cm (behind the objective lens) Additional Materials Reading
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