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 a magnifying glass with a
focal length of 2.8 cm as the eyepiece. What focal length is needed
for her objective lens? (Include the sign.)
m
An optical fiber uses one glass clad with another glass. What is the critical angle? (Assume the glass in the fiber has an index of refraction of 1.70, and the glass in the cladding has an index of refraction of 1.55.)
°
1.
Since the jeweler holds the diamond at the focal point of the magnifying glass, its image will be produced infinitely far away. This gives an angular magnification of :
M = ' /
M = N/f = 20.7 / 7
M = 2.96
A jeweler examines a diamond with a magnifying glass. If the near-point distance of the jeweler...
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 doctor examines a mole with a 17.0 cm focal length magnifying glass held 14.0 cm from the mole. (a) Where is the image? (Enter the image distance in meters. Include the sign of the value in your answer.) m (b) What is its magnification? (c) How big in millimeters is the image of a 4.70 mm diameter mole? mm
A doctor examines a mole with a 14.5 cm focal length magnifying glass held 14.0 cm from the mole. (a) Where is the image? (Enter the image distance in meters. Include the sign of the value in your answer.) m (b) What is its magnification? (c) How big in millimeters is the image of a 4.50 mm diameter mole? mm
Question 33 A doctor examines a mole with a 15.5 cm focal length magnifying glass held 12.2 cm from the male Wheels the image (Enter the image distance in em. Include the sign of the value in your answer.)
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A doctor examines a mole with a 16.5 cm focal length magnifying glass held 11.5 cm from the mole. (a) How far is the image from the lens? cm Is the image real or virtual? virtualreal (b) What is its magnification? ✕ (c) How big is the image of a 5.00 mm diameter mole? mm
A doctor examines a mole with a 16.8 cm focal length magnifying glass held 11.1 cm from the mole. (a) How far is the image from the lens? cm Is the image real or virtual? real virtual b) What is its magnification? (c) How big is the image of a 5.00 mm diameter mole? mm
A doctor examines a mole with a 17.4 cm focal length magnifying glass held 11.7 cm from the mole. (a) How far is the image from the lens? -0.36 хст Is the image real or virtual? real virtual (b) What is its magnification? (c) How big is the image of a 5.00 mm diameter mole? mm
A doctor examines a mole with a 16.5 cm focal length magnifying glass held 11.4 cm from the mole. (a) How far is the image from the lens? -0.37 x cm Is the image real or virtual? Oreal virtual (b) What is its magnification? 10 (c) How big is the image of a 5.00 mm diameter mole? 50 X mm
A doctor examines a mole with a 16.8 cm focal length magnifying glass held 11.5 cm from the mole. (a) How far is the image from the lens? cm Is the image real or virtual? real virtual Correct: Your answer is correct. (b) What is its magnification? (c) How big is the image of a 5.00 mm diameter mole? mm