How can you see a virtual image, when it's not "really there"?
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- There are two types of images real images and virtual images.
- A real image is formed when the light rays converge at a point after refraction or reflection.
- A virtual image is formed when light rays diverge from a point after refraction or reflection.
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- Time: 1 minute When a mirage is observed above a hot asphalt road, a stretch of road looks like a surface of the lake. Which of the following is true about the layers of air above the ground when the mirage is observed? n4 n3 n2 n1 asphalt nị n2 n3 > N4An older man can’t read a book closer than 60 cm away. The standard near point distance is 25 cm. He needs the following corrective lenses (a) -1.66 D diverging (b) 2.33 D converging (c) 2.75 D converging (d) 1.66 D converging (e) 4 D divergingA clerk at the local grocery store wears glasses that make her eyes look smaller than they actually are. Is the clerk nearsighted or farsighted? Explain.
- A nearsighted man cannot see objects clearly beyond 20cm from his eyes. How close must he stand to a mirror inorder to see what he is doing when he shaves?A clerk at the local grocery store wears glasses that make her eyes look larger than they actually are. Is the clerk nearsighted or farsighted? Explain.A 5.0-cm tall object stands in front of a converging lens. It is desired that the virtual image is 2.5 times larger than the object be formed by the lens. How far from the lens must the object be placed to accomplish this task, if the final image is located 15 cm from the lens?