### Question 4 of 15#### Which of the following is a true statement regarding the sign of the image distance for a thin lens?- ☐ The image distance for any lens is positive if the image is on the same side of the lens as the object.- ☐ The image distance for a converging lens is positive if the image is on the same side of the lens as the object.- ☐ The image distance for a diverging lens is negative if the image is on the opposite side of the lens as the object.- ☐ The image distance for any lens is positive if the image is on the opposite side of the lens as the object.- ☐ None of the above

The following are the sign conventions used when solving problems involving thin lenses All…

Answered: Which of the following is a true…

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Consider a converging lens that has a focal length (f). Which one of these is correct about the image when the object is placed in front of the lens at a distance of (3f/2 )? (Choices Below) __ The image is real, erect, and has the same size as the object__ The image is real, inverted, and magnified__ The image is virtual, inverted, and magnified__ The image is real, inverted, and diminished__ The image is real, erect, and diminished__ The image is real, erect, and magnified
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An object 4 cm tall is placed in front of the converging lens has a focal length of 10 cm. For each situation below, locate and describe the image (type, orientation, size, and location) using a ray diagramand the lens equations if the object is placed 40 cm from the lens. 30 cm from the lens. 20 cm from the lens 15 cm from the lens 5 cm from the lens
A sharp image of a pencil that’s 25 cm away from your eye is formed on your retina. As you move the pencil farther away from your eye, what happens to the lens of your eye in order to form a sharp image on the retina? It gets less curved, increasing its focal length It gets less curved, decreasing its focal length It does not change It gets more curved, increasing its focal length It gets more curved, decreasing its focal length
A converging lens is placed 36.0 cm to the right of a diverging lens of focal length 7.0 cm. A beam of parallel light enters the diverging lens from the left, and the beam is again parallel when it emerges from the converging lens. Calculate the focal length of the converging lens. f = _____ cm
An object is 60.0 cm from a converging lens and the object is 1.00 cm tall. What is the poisition and height of the image if the focal length of the lens is 25.0 cm? The object is at 0.0233 cm and the height of the image will be 0.715 cm upright. The object is at 0.0233 cm and the height of the image will be 0.000388 cm inverted. The object is at 42.9 cm and the height of the image will be 0.000388 cm upright. The object is at 42.9 cm and the height of the image will be 0.715 cm inverted.
A blue whale eyeball may be taken as a sphere that is about 15 cm in diameter. Assuming that it is filled with material with an index of refraction of 1.5, where would the image form for an object (in water) that is very far away? Just consider the initial image formed by refraction through the front surface. Select answer from the options below 15 cm behind the back of the eye 7.5 cm behind the front surface of the eye 15 cm behind the front surface of the eye Approximately 30 cm behind the back of the eye Approximately 50 cm behind the back of the eye
You are having trouble reading your cheat sheet during your physics exam because you wrote so small. You foresaw the problem, so you brought a small lens with you to the exam. You hold the lens 6 cm away from the page. The image you see is upright and 2.9 times the size of the writing on the page. where is image formed Is the image real or virtual what is the focal length of the lens are you using a converting lens or a diverging lens
Some lenses are shaped with one flat side and one spherically-shaped side. This shape is designed to focus parallel light rays onto a single point. In a few sentences, explain how the spherical shape of the lens' surfaces causes parallel light rays to focus on a single point. (Assume the light is travelling through air into a lens with an index of refraction greater than that of air.) Focal length Focal point
Q: You hold up a piece of paper by a lens and see the image of a candle projected on the paper. Is this image real or virtual? Q: Will the projected image show the candle right-side-up or upside-down? Q: You look through a concave (diverging) lens at a candle. Will the image you see be smaller or larger in size than the actual candle?
A converging lens of focal length f=2 cm is used to focus the image of an object onto a screen. The object and screen are separated by 15 cm. The lens is placed between the object and the screen, at a distance from the screen such that the image of the object is focused into the screen. At what distance from the screen must the lens be placed in order to have an image magnification < 1? Provide your answer to two significant figures. distance = cm.