1. A retired bank president can easily read the fine print of the financial page when the newspaper is held no closer than arm's length, 60.0 cm from the eye. What should be the focal length of an eyeglass lens that will allow her to read at the more comfortable distance of 24.0 cm? Assume a lens-to-retina distance of 2.0 cm.
2. What is the strength of a lens which forms an image 24 cm from the lens when the object is 40 cm away?
3. A ray of light is incident on glass-air interface at the critical angle of 41 deg., what is the refracted angle?