nearsighted man cannot see clearly objects farther than 30.0 cm from their eyes. To prescribe them corrective lenses in the form of glasses that will sit 1.90 cm from their eyes. The corrective lenses will be planoconcave and made of polycarbonate (n = 1.586). a. What is the focal length of the corrective lens?  b. What is the radius of curvature of the concave side of the lens?  A 4.00 cm tall object is placed 66.0 cm in front of the corrective lens. c. Where will the image appear?  d. What is the height of the image?  e. Is the image upright or inverted? Explain how you know.  f. Draw a ray diagram

A converging lens is used to produce a virtual image that is erect and has a magnification of 3.90 with an object placed 14.3cm from the lens. a. What is the focal length of the lens? b. If the object distance is doubled, what type of image is produced? c. What is the new magnification?

A 15 cm object sits 80 cm to the left of a converging lens with a focal length of f=30 cm. There is a second converging lens with a focal length of f=20 cm sitting 60 cm to the right of the first converging lens.  a. What is the overall magnification for this two-lens system? b. What is the height of the final image?

A microscope has a 12.0x eyepiece and a 59.0x objective lens 20.0 cm apart. What is the focal length in centimeter of the eyepiece? A. 1.26. B. 2.08. C. 2.45. D. 3.19. E. 3.57

The objective lens of the refracting telescope at the Lick Observatory in California has a focal length of 57 ft.a. What is the refractive power of this lens?b. What focal length (mm) eyepiece would give a magnificationof 1000× for this telescope?

Which of the following statements for single optic devices are true? Choose all that apply. a. Any physicist worth their weight in garbanzo beans (not chick peas) knows that concave lenses will have a positive focal length. b. For virtual images, the image distance is positive and the object distance is negative. c. By convention, if the image height is positive then the image is upright. d. If an optic produces an image with a magnification of 0.6, then the image is diminished. e. Experiments have shown that convex mirrors can create real images. f. If an image has a magnification of -6, then the image is real.

A doctor examines a mole with a 15.8 cm focal length magnifying glass held 13.6 cm from the mole. a. Where is the image? (Include the sign of the value in your answer.)  m b. What is its magnification?   c. How big in millimeters is the image of a 4.87 mm diameter mole?  mm

A. Calculate the focal length of the mirror formed by the convex side of a shiny spoon that has a 1.67 cm radius of curvature. B. What is its power in diopters?

A compound microscope has two converging lenses, the objective lens and the eyepiece. An object is placed 1.5 cm in front of the objective lens. The power of the objective lens is around +83.33 D, and the power of the eyepiece is +11.25 D. The two lenses are separated by a distance of 14 cm. a. What is the magnification of the objective lens (with the correct sign)? b. What is the overall magnification of the microscope (with the correct sign)? c. Where will the final image of the eyepiece be located relative to the object (in cm)?

A lens has a focal length of f = +30.0cm . An object is placed at 40.0cm from the lens. a. Is the lens converging or diverging? b. What is the image distance? (Include the + or – sign.) c. What is the magnification? (Include the + or – sign.) d. Is the image real or virtual? e. Is the image upright or inverted?