A fingerprint is 5.40 cm from a lens with a focal length of 14.9 cm. What is the image distance? Please give your answer in centimeters.

The near point of an eye is 38.0 cm. A corrective lens is to be used to allow this eye to focus clearly on objects at the distance of the healthy near point. What should be the focal length of this lens? Incorrect. Tries 2/99 Previous Tries What is the power of the needed corrective lens in diopters? Submit Answer Tries 0/99 Submit Answer

Problem 8: Consider the compound optical system shown in the diagram, where two thin lenses of focal lengths 7.5 cm (left lens) and 7.5 cm (right lens) are separated by a distance 45 cm. a. If an object is placed a distance do = 17.3 cm to the left of the first lens (the left one) as shown in the figure, how far to the right of that lens, in centimeters, is the image formed? b. What is the magnification of the first lens? c. What is the object distance, in centimeters, for the second lens (the right lens)? d. What is the image distance, in centimeters, for the second lens? e. What is the magnification of the second lens?

The figure shows an object and its image formed by a thin lens. Assume that d1 = 0.552 m, d2 = 0.398 m, and h = 7.50E-2 m. What is the focal length of the lens (in m; answer sign and magnitude)?

A postive lens forms a real image of an object placed 32cm to the left of the lens. The real image is found 134cm to the right of the lens. What is the focal length of the lens?

A lens produces an upright image of an object. The image is reduced in size by a factor of 3.00 when the object is a distance of 16.9 cm from the lens. Determine the focal length.

A contact lens is made of plastic with an index of refraction of 1.40. The lens has an outer radius of curvature of +1.90 cm and an inner radius of curvature of +2.42 cm. What is the focal length of the lens? Answer in cm

A convergent lens of focal length 19 cm gives a real image that is 3.1 times larger than the object. Calculate the distance between the object and the lens, in centimeters.

Consider two thin lenses with focal lengths f1=10.0cm and f2=-15.0cm. The lenses are placed in contact. Calculate the equivalent focal length of the lenses. What is the image distance of an object placed 20.0cm from the lenses? Draw a diagram of the optical system and label the relevant quantities (s0,si,f).

At what distance away should an object be placed from a convex spherical mirror that has a focal length of -28.2 cm such that the lateral magnification of the image is 0.573? Express your numeric answer in cm.