Direct sunlight hits the water at an angle 30 degrees to the air-water surface normal. At what angle does this light penetrate into the water? If this light is reflected off an underwater object whose normal is at 10 degrees to the vertical then in wat direction does light travel through air after leaving the water? using some scrap papers I manage to find the answer for the first part to be 22 degrees. the seconds part of the question i do not understand what "normal is at 10 degrees to the vertical" means?