4. A person has his/her far point at 10 m. what is the vision defect? What is this person's eye power? what is the optical power needed to correct his/her vision? What type of lens is needed? What is the focal length of the lens needed?

5. Polarized light goes through a polarizer that has an initial intensity of 200 Watts/m2 . The angle between the electric field of the polarized light and the transmission axis of the polarizer is 22 degrees. What is the intensity of the light transmitted?