An object is placed 25 cm in front of a lens of focal length 20 cm. 60 cm past the first lens is a second lens of focal length 25 cm. How far past the 25 cm lens does the final image form? а. 20 cm b. 40 cm с. 16 cm d. 25 cm e. 47 cm
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- xxi* 32. Use ray diagrams to locate the images of the following objects: (a) an object that is 10 cm from a convex lens of +15-cm focal length and (b) an object that is 10 cm from a concave lens of -15-cm focal length. (c) Calculate the image locations for parts (a) and (b) using the thin lens equation. Check for consistency.= 3. A 15 cm tall object sits 80 cm to the left of a converging lens with a focal length of fi 30 cm. There is a second converging lens with a focal length of f2 = 20 cm sitting 60 cm to the right of the first converging lens. dige de a. Where is the image from the first lens formed? (find di1) f₁ = 30 cm do = 80cm di = ? C. -14 1-do₂ 'वे di = [130 - 50 ] = 48 cm to the right of lens 1 = b. What is the object distance for the second lens? (find doz) f₂ =20 cm do=48 cm di = ? Where is the final image formed? (find diz) do d. What is the distance between the original object and the final image? What is the overall magnification for this two-lens system? f. What is the height of the final image? (find hi2) 2
- Two identical diverging lenses are separated by 18 cm. The focal length of each lens is -8.0 cm. An object is located 4.0 cm to the left of the lens that is on the left. Determine the final image distance relative to the lens on the right. cm5. A diverging lens has a focal length that has a magnitude of 32.0 cm. An object is placed 21.0 cm in front of this lens. Calculate the magnification.You are building a compound microscope with an objective lens of focal length 0.560 cm and an eyepiece lens of focal length 4.65 cm. You mount the lenses 16.5 cm apart. What is the maximum magnification of your microscope? а. 158 b. 16.5 С. 792 d. 125 е. 62.4
- A camera lens used for taking close-up photographs has a focal length of 55.0 mm. The farthest it can be placed from the film is 33.0 mm. What is the closest object that can be photographed? answer choices a)8.25 cm b)3.30 cm c)6.60 cm d)5.08 cm2. A convex lens with focal length f formed an image of the object is shown in the diagram below Object 10 cm 15 cm F, F2 Image F1 and F2 are the focus points of the lens. What is the focal length, fof the lens? А. 11.2 cm С. 12.2 ст В. 11.8 сm D. 14.5 cm20
- 16.4. A concave lens has focal length of 27 cm. At what distance from the lens a tall object be placed so that it forms an image at 18 cm from the lens? Answer: b =The distance from the lens of a particular eye to the retina is 1.96 cm. What is the focal length of the lens when the eye produces a clear image of an object 35.9 cm away? cm