Using the equation for period length, you get an answer of about 4.1 seconds.
I’m not sure if its correct but I think it’s focal Ray point
For concave mirrors, some generalizations can be made to simplify ray construction. They are: An incident ray traveling parallel to the principal axis will reflect and pass through the focal point. An incident ray traveling through the focal point will reflect and travel parallel to the principal axis.
Answer:
The answer is going to be C.
Explanation:
Trust me. Im an expert in physics