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Chapter 35: Q. 6 (page 1017)
A tall man is in front of a camera with a focal length lens. How tall is his image on the detector?
The height of the image will be
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Mars is viewed through a telescope on a night when it is from the earth. Its angular size as seen through the eyepiece is , the same size as the full moon seen by the naked eye. If the eyepiece focal length is , how long is the telescope?
In FIGURE P, what are the position, height, and orientation of the final image? Give the position as a distance to the right or left of the lens.
A common optical instrument in a laser laboratory is a beam expander. One type of beam expander is shown in FIGURE P . The parallel rays of a laser beam of width w1 enter from the left.
a. For what lens spacing d does a parallel laser beam exit from the right?
b. What is the width w2 of the exiting laser beam?
A scientist needs to focus a helium-neon laser beam to a spot behind a lens
(a) what focal-length lens should she use?
(b) what minimum diameter must the lens have?
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’s magnification is ?
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