Mirror Select the correct answer.
Considering the case where the object is located at the focal point.
Which of the following is TRUE?
object
Focal point
No rays will be reflected.
No image is formed.
The reflected rays will meet at a point
away from the focal point.
The image formed is a real one.

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)