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Chapter 35: Q. 12 (page 1017)
Ellen wears eyeglasses with the prescription.
a. What eye condition does Ellen have?
b. What is her far point without the glasses?
a. Ellen has Myopia.
b. The far point without the glasses is.
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What is the f-number of a relaxed eye with the pupil fully dilated to mm? model the eye as a single lens 2.4 cm in front of the retina
A diffraction-limited lens can focus light to a 10diameter spot on a screen. Do the following actions make the spot diameter larger, make it smaller, or leave it unchanged?
A. Decreasing the wavelength of the light.
B. Decreasing the lens diameter.
C. Decreasing the lens focal length.
D. Decreasing the lens-to-screen distance.
A sheet of glass has and . A narrow beam of white light is incident on the glass at . What is the angular spread of the light inside the glass?
A friend lends you the eyepiece of his microscope to use on your own microscope. He claims the spatial resolution of your microscope will be halved, since his eyepiece has the same diameter as yours but twice the magnification. Is his claim valid? Explain.
A -tall object is to the left of a lens with a focal length of . A second lens with a focal length of is to the right of the first lens.
a. Use ray tracing to find the position and height of the image. Do this accurately using a ruler or paper with a grid, then make measurements on your diagram.
b. Calculate the image position and height. Compare with your ray-tracing answers in part a.
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