d) As people age, the crystalline lens hardens (a condition called presbyopia or “old-age" eyes) and can only vary in focal length from 12 to 15.60 cm. Calculate range of vision (the new near point and far point) for this older eye. e) Based on part d) why might an older person hold the newspaper at arm's length to read it?

How could you very quickly make an approximate measurement of the focal length of a converging lens? Could the same method be applied if you wished to use a diverging lens? Explain.

4.To measure the focal length of a diverging lens, a converging lens is placed in contact with it as shown to the right. The sun's focused by this Image point made by first lens (object point for second lens) are rays combination at a point 28.5 cm behind Image made by second lens the lenses. If the converging lens has a focal length fc of 16 cm, what is the focal length of the diverging lens? (final image) fc -fr =28.5 cm

e) erect and 0.489 times the A nearsighted man uses his ideally prescribed eyeglasses that have a refractive power of -1.95 diopters. He would like a prescription for contact lenses. What is the correct contact lens prescription if he normally wears his eyeglasses a distance of 1.32 cm from his eyes? a) -1.90 diopters b) -2.10 diopters c) 1.90 diopters 16. d) -2.00 diopters e) 2.00 diopters n00 mirror as shown

w9-19 physics An object is placed 20.0 cm from a converging lens with focal length 15.0 cm (see the figure, not drawn to scale). A concave mirror with focal length 10.0 cm is located 76.0 cm to the right of the lens. Light goes through the lens, reflects from the mirror, and passes through the lens again, forming a final image. d=76.0 What is the location of the final image?  ______cm to the left of the lens

The focal length of a simple lens depends on the color (wavelength) of light passing through it. Why? Is it possible for a lens to have a positive focal length for some colors and negative for others? Explain.

3. Two converging lenses above are placed 20.0 cm apart, both with focal lengths of 10.0 cm. A candle is 30 cm away from the first lens. By means of a neat ray tracing, locate the final image formed by the combination of the two lenses. b) Use mathematics to fully describe the image created by the lenses.

I continue to get the wrong answer. TIA.

An object is held 76.7 cm away from a lens. The lens has a focal length of 78.3 cm. A.) Determine the image distance. -3753 cm B.) Determine the magnification. 48.93 C.) If the object is 6.3 cm long, determine the image height. 308.25 cm D.) Which of the following are true about the image? Choose all that are true. O The image is magnified. u The image is inverted. The image is virtual. - The image is diminished. The image is real. - The image is upright. E.) Which of the following are true about the lens? Choose all that are true. The lens is concave. The lens is diverging. M The lens is converging. M The lens is convex.

A converging lens has a focal length of 29 cm. An object is placed 10.2 cm in front of the lens. What is the location of the image? cm b. What is the magnification? c. Is the image upright, or inverted? ONLY 1 ATTEMPT IS ALLOWED FOR THIS PART. --Select-v d. Is the image in front of the lens, or behind the lens? ONLY 1 ATTEMPT IS ALLOWED FOR THIS PART. --Select-- v