How far from a 59.0- mm -focal-length lens must an object be placed if its image is to be magnified 3.50× and be real? B)

The image is formed on the retina even when the distance of the object from the eye increases The lens of the eye becomes thinner and the focal length increases. O The lens of the eye becomes thicker and the focal length decreases. The lens of the eye becomes thinner, and the focal length decreases. с The lens of the eye is not affected and remains the same thickness. O

A contact lens is made of plastic with an index of refraction 1.50. The lens has an outer radius of curvature of + 1.65 cm and an inner radius of curvature of + 5.85 cm. What is its focal length? TTTT Paragraph Arial 3 (12pt) E - E - T- 回i 公 T T, Bullet List O f. Mashups- HTML CSS

a) Find an equation for the length L of a refracting telescope in terms of the focal length of the objective fo and the magnification m. L =    (b) A knob adjusts the eyepiece forward and backward. Suppose the telescope is in focus with an eyepiece giving a magnification of 20.3. By what distance must the eyepiece be adjusted when the eyepiece is replaced, with a resulting magnification of 1.0 ✕ 102? Must the eyepiece be adjusted backward or forward? Assume the objective lens has a focal length of 2.32 m. (Use a positive value if the eyepiece must be moved forward toward the objective lens and negative values if the eyepiece must be moved backwards.) cm