Magnifying Glass With the Image at Infinity: A magnifying glass uses a converging lens with a refractive power of 20 diopters. What is the angular magnification if the image is to be viewed by a relaxed eye with a near point of 25 cm?
A. 5.0
B. 3.0
C. 4.0
D. 1.0
E. 2.0
Answer: A
You might also like to view...
Which of the following is not conserved?
a. lepton number b. baryon number c. meson number d. energy
A coil to be operated in air has 200 loops in a length of 3 cm. What current is required to produce a flux density of 0.02 T?
What will be an ideal response?
An airplane flies at a constant speed at an angle of 25 degrees above the horizontal. Which statement below is not true?
A. The net force on the plane is zero. B. The lift is the same magnitude as the weight. C. The plane has a constant velocity. D. The thrust is greater in magnitude than the drag.
In which of these processes is an element transformed into a completely different element?
A) alpha decay B) beta decay C) both of these D) none of the above