Solved: A solar cooker, really a concave mirror pointed at
Chapter 32, Problem 7P(choose chapter or problem)
A solar cooker, really a concave mirror pointed at the Sun, focuses the Sun’s rays 18.0 cm in front of the mirror. What is the radius of the spherical surface from which the mirror was made?
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer