Who Can See Who? - Directions

 

How it Works:

Using the Who Can See Who? Concept Builder is quite simple. You will be presented with a plane mirror, five objects, and an eye position. You have to identify the five image locations. You also have to identify the images that can be seen from the given eye position. The Concept Builder will step you through the process beginning with the locating of the images. To locate an image simply tap on the grid in the region behind the mirror. You will be given immediate feedback if your answer is incorrect. Keep trying until you get it correct. You will begin with the image of Object A and progress in alphabetical order until you dietermine the location of the image of Object E. Once all images have been located, you must determine which can be seen from the given eye position. You do so by tapping on the letters to the right of the mirror and attached grids. Tapping once will select Visible. Tapping a second time will select Not Visible. Each consecutive tap thereafter will toggle back and forth between the two options. Once you have selected Visible or Not Visible for all five objects, a Check Answer button will appear. If you are satisfied with your answers, tap on the Check Answer button. Your answer will be evaluated and your Progress Report will be updated.

Your goal is to earn "Stars" and to complete one or more difficulty levels. Stars are earned when you show success on a particular question. Once you show success on all the questions for a particular difficulty level, you will earn the trophy for that level.

 

Earning Stars

When you start up any of the activities, the number of questions for that activity are shown in the Progress Report area of the Concept Builder. You will notice that there is either a Yellow or a Red background for each question number. When starting up an activity, the background color is Yellow. Answering a "Yellow" question correctly earns you a star for that question number. However, answering it incorrectly turns the background color to Red. A question number with a Red background must be correctly answered twice (without a miss) in order to earn a star. 

 

Getting Help

You will notice that there is a Help Me button underneath the Progress Report. You should learn to use this feature of the program. It's how you can turn an exercise in answering questions into an exercise in learning. Tapping on the Help Me button will open a page with help that is specific to each question. Of course, the Help pages are only helpful if you read them. So take the time to read them. Each Help page contains four sections: a discussion of the Fundamentals, a display of the various Questions in the Question Group, a section titled "How to Think About This Situation", and a set of links to resources in our Tutorial section. You should pay attention to the sectoin titled How to Think About This Situation. You will find what you need to know in the two or three paragraphs in this section. You will also become a better Physics student for doing that. That is, after all, the goal of such an activity as Who Can See Who?
 

Thanks for being patient with the Directions. Happy learning!