Question 7 (1 points) The lens shown has radii 10.4cm and 23.0cm and is made of a material with index of refraction 1.57. Use the shape of the lens to assign the given radii and their signs (hint: which side looks more curved?). If an object is placed 18.6cm to the left of the lens, what will be the position of the image? Give a positive or negative value for the image position, using the usual sign conventions for lenses. Image size: s M L Max Please enter a numerical answer below. Accepted formats are numbers or \"e" based scientic notation e.g. 0.23, 2, 1e6, 5.23e8 Enter answer here cm No answer submitted 0 of Unlimited checks used AA kudu.com CL 19:11 SHOW HINT Question 12 (1 points) A nearsighted person has a far point of 20.9cm and is prescribed contact lenses to correct her vision. What lens strength (a.k.a., lens power), in Diopters, should be prescribed? Give your answer using the usual convention of positive values for converging lenses and negative values for diverging lenses. Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here D CHECK No answer ANSWER submitted 0 of Unlimited checks used Question 13 (1 points) Darcy suffers from farsightedness equally severely in both eyes. The focal length of either of Darcy's eyes is 19.4 mm in its most accommodated state (i.e, when the eye is focusing on the closest object that it can Scroll to Back Top Questions AA kudu.com C19:11 SHOW HINT Question 16 (1 points) What should be the working distance of a microscope in order for its objective lens with 1.68 mm focal length to produce a magnification of -60? The working distance is the distance from the object to the objective lens. Give your answer with at least 3 significant digits! [Warning: Kudu's answer tolerance for this question has been reset to expect an answer within 1% of the correct one. ] Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here 2.8 mm 2.8 mm X Your Answer CHECK Saved ANSWER 32 of Unlimited checks used Powered in part by Crash Course Physics Powered in part by OpenStax Download for free at http://cnx.ora/contents/031da8d3- Scroll to Back Top Questions AA kudu.com C