A person with a near-point distance of 25 cm is able to get a usable angular...
A person with a near-point distance of 25 cm is able to get a usable angular magnification of 12 with a particular magnifying glass. Her friend is only able to get a usable angular magnification of 7. What is the friend’s near-point distance?
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A person with a near-point distance of 25 cm is able to get a
usable angular...
A person with a near-point distance of 32 cm is able to get a usable angular...
A person with a near-point distance of 32 cm is able to get a usable angular magnification of 12 with a particular magnifying glass. Her friend is only able to get a usable angular magnification of 7. What is the friend’s near-point distance?
A person with a near-point distance of 30 cm uses a magnifying glass with a focal...
A person with a near-point distance of 30 cm uses a magnifying glass with a focal length of 3 cm. What is the magnification of the magnifying glass? O 10 0-10 90 -90
A jeweler examines a diamond with a magnifying glass. If the near-point distance of the jeweler...
A jeweler examines a diamond with a magnifying glass. If the near-point distance of the jeweler is 20.7 cm, and the focal length of the magnifying glass is 7.00 cm, find the angular magnification when the diamond is held at the focal point of the magnifier. Assume the magnifying glass is directly in front of the jeweler's eyes. (Include the sign.) ✕ A grade-school student plans to build a 55 power telescope as a science fair project. She starts with...
Chapter 26, Problem Ong A farsighted person can read printing as close as 25.0 cm when...
Chapter 26, Problem Ong A farsighted person can read printing as close as 25.0 cm when she wears contacts that have a focal length of 49.0 cm. One day, however, she forgets her contacts and uses a magnifying glass, as in the drawing. It has a maximum angular magnification of 7.31 for a young person with a normal near point of 25.0 cm. What is the maximum angular magnification that the magnifying glass can provide for her? Maging Number Units...
A jeweler whose near point is 68 cm from his eye uses a magnifying glass as...
A jeweler whose near point is 68 cm from his eye uses a magnifying glass as in the drawing to examine a watch. The watch is held 3.5 cm from the magnifying glass. Find the angular magnification of the magnifying glass.
An object has an angular size of 0.0183 rad when placed at the near point (24.9...
An object has an angular size of 0.0183 rad when placed at the near point (24.9 cm) of an eye. When the eye views this object using a magnifying glass, the largest possible angular size of the image is 0.0496 rad. What is the focal length of the magnifying glass?
A farsighted person has a near point of 75 cm rather the normal 25 cm. What...
A farsighted person has a near point of 75 cm rather the normal 25 cm. What strength lens, in diopters, should be prescribed to correct this vision problem? Object , o = 25cm, image, i= -75cm(negative, in front of lens) Martin is severe myopia, with a far point of 15cm. he wants to get a glass that he ‘ll wear while using his computer, whose screen is 75cm away. What refractive power will these glasses required? Object, o=75 cm, image,...
A stamp collector observed his favorite stamp with a magnifying glass with a focal length of...
A stamp collector observed his favorite stamp with a magnifying glass with a focal length of 24.0 cm. The image of the stamp was located at his near point distance of 30.0 cm. What was the approximate angular magnification of the magnifying glass when the collector observed his stamp?
Given: Assume the near point (of the eye) is 25 cm . The distance between eyepiece...
Given: Assume the near point (of the eye) is 25 cm . The distance between eyepiece and objective lens in a certain compound microscope is l = 17.6 cm . The focal length of the eyepiece is fe = 2.57 cm , and that of the objective lens is fo = 0.3 cm . What is the overall magnification of the microscope? Caution: a negative quantity this is. Use the approximation l − fe ≈ l and object distance do...
an older person needs a pair of reading glasses.Her near point is at 48 cm from...
an older person needs a pair of reading glasses.Her near point is at 48 cm from her eyes and reading glasses are 2 cm from her eyes. The glasses should allow her to read 25 cm away. What are the object and image distances? what is the magnification of these lenses? What is the focal length of the pair of glasses? What is the optical power of the lens pair? What type of lenses (converging, diverging) does she need?
A person with a near-point distance of 30 cm uses a magnifying glass with a focal length of 3 cm. What is the magnification of the magnifying glass? O 10 0-10 90 -90
Chapter 26, Problem Ong A farsighted person can read printing as close as 25.0 cm when she wears contacts that have a focal length of 49.0 cm. One day, however, she forgets her contacts and uses a magnifying glass, as in the drawing. It has a maximum angular magnification of 7.31 for a young person with a normal near point of 25.0 cm. What is the maximum angular magnification that the magnifying glass can provide for her? Maging Number Units...
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