An object 30 cm in front of a concave spherical mirror (f = 10 cm) is moved toward the mirror until it is 20 cm from it. Sketch ray diagrams for these cases and estimate the factor by which the image magnification changes.
Question 2
Jane's flashy boy friend has just given her a ring with a huge diamond. Jane, who has studied physics, measures the polarizing angle for the stone and finds that the polarizing angle is 62.97. The stone is
a. fluoride, n = 1.560.
b. crown glass, n = 1.517.
c. spinel, n = 1.712.
d. zircon, n = 1.960.
e. diamond, n = 2.417.