Chapter 34: Q. 20 (page 990)
To a fish in an aquarium, the -thick walls appear to be only thick. What is the index of refraction of the walls?
Short Answer
The index of refraction of the walls is
Chapter 34: Q. 20 (page 990)
To a fish in an aquarium, the -thick walls appear to be only thick. What is the index of refraction of the walls?
The index of refraction of the walls is
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Get started for freeFIGURE EXshows a transparent hemisphere with radius and index of refraction What is the maximum distance for which a light ray parallel to the axis refracts out through the curved surface?
A 2.0-cm-tall candle flame is 2.0 m from a wall. You happen to have a lens with a focal length of 32 cm. How many places can you put the lens to form a well-focused image of the candle flame on the wall? For each location, what are the height and orientation of the image?
A keratometer is an optical device used to measure the radius of curvature of the eye’s cornea—its entrance surface. This measurement is especially important when fitting contact lenses, which must match the cornea’s curvature. Most light incident on the eye is transmitted into the eye, but some light reflects from the cornea, which, due to its curvature, acts like a convex mirror. The keratometer places a small, illuminated ring of known diameter 7.5 cm in front of the eye. The optometrist, using an eyepiece, looks through the center of this ring and sees a small virtual image of the ring that appears to be behind the cornea. The optometrist uses a scale inside the eyepiece to measure the diameter of the image and calculate its magnification. Suppose the optometrist finds that the magnification for one patient is 0.049. What is the absolute value of the radius of curvature of her cornea?
A laser beam in air is incident on a liquid at an angle of with respect to the normal. The laser beam's angle in the liquid is . What is the liquid's index of refraction?
A -tall object is in front of a converging lens that has a focal length.
Use ray tracing to find the position and height of the image. To do this accurately, use a ruler or paper with a grid. Determine the image distance and image height by making measurements on your diagram.
Calculate the image position and height. Compare with your ray-tracing answers in part .
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