If you placed a screen at the location of a virtual image, would the image appear on the screen? Why or why not?
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- What is the height of an image in a diverging lens if: the object is 2cm tall, stands 20cm in front of the lens, and the focal length is 25cm?If you look at a fish through the corner of a rectangular aquarium, you sometimes see two images, one on each side of the corner, as shown. Sketch a top view of the situation and trace the path of some of the light rays that reach your eye from the fish to show how this can happen.How would you solve this question?
- One method of measuring the focal length of a lens is to form an image of an object that is many focal lengths away from the lens. Show from equation (1/f=1/o+1/i) that the image distance is approximately equal to the focal length when the object distance is very large (say, o=100f). What happens when the object distance become infinitely far away?The focal length of a diverging lens is negative. If f= -26 cm for a particular diverging lens, where will the image be formed of an object located 53 cm to the left of the lens on the optical axis? cm to the left of the lens What is the magnification of the image?A 2.1-cm-tall object is 30 cm to the left of a lens with a focal length of 15 cm. A second lens with a focal length of -5 cm is 45 cm to the right of the first lens. Calculate the distance between the first image and the second lens. Calculate the image height.
- You are looking through the wall of the aquarium to a fish. Is the fish on the same distance as you see it, further or closer? Make a drawing.You are a marine biologist and want to pull a star fish out of a tank of water for testing. Looking from the top of the tank, where is the actual starfish compared to the image of the starfish that you see from the surface? Explain.A type of mirage called a pingo is often observed in Alaska. Pingos occur when the light from a small hill passes to an observer by a path that takes the light over a body of water warmer than the air. What is seen is the hill and an inverted image directly below it. Explain how these mirages are formed.