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10. Mark the following statements as true or false: Incident parallel light rays converge if the lens's focal length is negative. (6.) If the paths of converging light rays are traced backwards, they appear to have come from the "Focal point" called (c) A double convex lens has a negative focal length. (d) The focal length of a lens is always positive.

25992 Students Helped in Physics 101 Mechanics “Numerade has a great goal - to increase people's educational levels all around the world. Educators do not complete student's personal homework tasks. We create video tutorials that may be used for many years in the future.” Dr. Mei Lin Chen PhD in Physics 101 Mechanics

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A certain lens has a focal length (f) of -1.4 cm. The negative focal length means it is a concave (diverging) lens. If you place an object at 5.9 cm, the image distance will be cm. The sign on this indicates that it is a virtual image. If the object height is 12.5 cm, the image height will be cm. The sign on this indicates that the image is upright.

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44601 Students Helped in Physics 101 Mechanics "The format has forced me to think about what knowledge is needed by the student to solve a problem and present it concisely and understandably within the time constraint of the video." Dr. Emily Green PhD in Physics 101 Mechanics

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1- why are two focal lengths of a cylindrical lens not equal? 2- How would you alter the shape of the lens to reduce the amount of cylindrical aberration? 3- its possible to obtain a non-inverted real image with a converging lens? A non-inverted virtual image? explain 4- For any converging lens of focal length f, where would you place the object to obtain an image as far away as possible?. How large would the image be?