Q. Two lenses that are 35 cm apart are used to form an image. Lens 1 is converging and has a focal length 14 cm; lens 2 is diverging and has a focal length -7.0 cm. The object is placed 24 cm to the left of lens 1. (a)Use a ray diagram to find the approximate location of the image. (b) Is the image upright or inverted? (c) Is the image real or virtual? Explain. (d) Determine the distance from lens 1 to the final image for the system using the lens equation. (e) What is the magnification of this image?
Q. A drinking straw 20cm long and 3.0mm in diameter stands vertically in a cup of juice 8.0cm in diameter. A section of straw 6.5cm long extends above the juice. A child sucks on the straw, and the level of juice in the glass begins dropping at 0.23cm/s. by how much does the pressure in the child's mouth differ from atmospheric pressure?