Which one of the following numbers is equivalent to the number 0.0001776?
A) 1.776 10-4
B) 17.76 10-3
C) 1776 10-5
D) 177.6 10-7
Question 2
If a spherical convex mirror has a radius of curvature R, the magnitude of its focal length is
A) R/2.
B) R/4.
C) R.
D) 2R.
E) 4R.