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Chapter 35: Q.1. (page 1016)
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.
Glasses with converging lenses
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A beam of white light enters a transparent material. Wavelengths for which the index of refraction is n are refracted at angle .
Wavelengths for which the index of refraction is n + , where , are refracted at angle .
a). Show that the angular separation of the two wavelengths, in radians, is .
b). A beam of white light is incident on a piece of glass at 30.0°. Deep violet light is refracted 0.28° more than deep red light. The index of refraction for deep red light is known to be 1.552. What is the index of refraction for deep violet light?
Your task in physics laboratory is to make a microscope from two lenses. one lens has a focal length of the other objective, and you want the eyepiece to be 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?
High-power lasers are used to cut and weld materials by focusing the laser beam to a very small spot. This is like using a magnifying lens to focus the sun light to a small spot that can burn things. As an engineer you have designed a laser cutting device in which the material to be cut is placed behind the lens. you have selected a high-power laser with a wavelength of
your calculation indicates that the laser must be focused to a spot in order to have sufficient power to make the cut. what is the minimum diameter of lens you must install?
High-power lasers are used to cut and weld materials by focusing the laser beam to a very small spot. This is like using a magnifying lens to focus the sun’s light to a small spot that can burn things. As an engineer, you have designed a laser cutting device in which the material to be cut is placed 5.0 cm behind the lens. You have selected a high-power laser with a wavelength of 1.06 mm. Your calculations indicate that the laser must be focused to a 5.0@mm@diameter spot in order to have sufficient power to make the cut. What is the minimum diameter of the lens you must install?
What is theof a lens with a focal length and adiameter aperture?
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