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Chapter 35: Q. 16 (page 1017)
A standardized biological microscope has an focal length objective. what focal-length eyepiece should be used to achieve a total magnification of?
the focal-length eyepiece should be used to achieve a total magnification of.
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A -tall object is from a screen. A diverging lens with focal lengthis in front of the object. What are the focal length and distance from the screen of a second lens that will produce a well-focused, -tall image on the screen?
A reflection telescope is build with a diameter mirror having a focal length. it is used with a eyepiece. what are
(a) the magnification and
(b) the of the telescope?
A camera has a circular aperture immediately behind the lens. Reducing the aperture diameter to half its initial value will
A. Make the image blurry.
B. Cut off the outer half of the image and leave the inner half unchanged.
C. Make the image less bright.
D. All the above.
Explain your choice.
A camera takes a properly exposed photo at and . What shutter speed should be used if the lens is changed to ?
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?
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