A concave mirror has a focal length of 20 cm. What is the magnification if the object and image distances are 10 cm and -20 cm respectively?
a. 1
b. 2
c. 1/2
d. 1/4
e. -1/2
B
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Sort the following hypothetical discoveries into the appropriate bins as follows:
Consistent with theory: The statement describes a discovery that we could reasonably expect to find if the nebular theory is correct.
Not consistent with theory: The statement describes a discovery that would force us to modify or discard the nebular theory.
