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Chapter 35: Q. 10 (page 1017)
A camera takes a properly exposed photo with a diameter aperture and a shutter speed of . What is the appropriate aperture diameter for a shutter speed?
The Diameter of the aperture is.
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The objective lens of a telescope is a symmetric glass lens with radii of curvature. The eyepiece lens is also a symmetric glass lens. What are the radii of curvature of the eyepiece lens if the telescope鈥檚 magnification is ?
Your task in physics laboratory is to make a microscope from two lenses. One lens has a focal length of 2.0 cm, the other 1.0 cm. You plan to use the more powerful lens as the objective, and you want the eyepiece to be 16 cm from the objective.
a. For viewing with a relaxed eye, how far should the sample be from the objective lens?
b. What is the magnification of your microscope?
Suppose you wanted special glasses designed to let you see underwater without a face mask. Should the glasses use a converging or diverging lens? Explain.
An astronomer is trying to observe two distant stars. The stars are marginally resolved when she looks at them through a filter that passes green light with a wavelength near 550 nm. Which of the following actions would improve the resolution? Assume that the resolution is not limited by the atmosphere.
A. Changing the filter to a different wavelength. If so, should she use a shorter or a longer wavelength?
B. Using a telescope with an objective lens of the same diameter but a different focal length. If so, should she select a shorter or a longer focal length?
C. Using a telescope with an objective lens of the same focal length but a different diameter. If so, should she select a larger or a smaller diameter?
D. Using an eyepiece with a different magnification. If so, should she select an eyepiece with more or less magnification?
A hydrogen discharge lamp emits light with two prominent wavelengths: (red) and (blue). The light enters
a flint-glass prism perpendicular to one face and then refracts
through the hypotenuse back into the air. The angle between
these two faces is .
a. Use Figure to estimate to the index of refraction
of flint glass at these two wavelengths.
b. What is the angle (in degrees) between the red and blue light
as it leaves the prism?
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