Who Can See Who? - Questions

The Who Can See Who? Concept Builder is comprised of 36 questions. The questions are divided into 12 different Question Groups and spread across three difficulty levels. Questions in the same group have the same mirror length and position; the objects are positioned at identical or nearly identical locations; the eye position is different fro different questions in the same group. The Concept Builder is coded to select at random a question from each group until a student is successful with that group of questions.

There are three different difficulty levels that can be engaged in through the Concept Builder. There is little difference in the difficulty of questions from one difficulty level to the next. Difficulty levels are differentiated from one another in terms of the number of questions included in each. The three difficulty levels are differentiated as follows:
 

• Apprentice Difficulty Level: Question Groups 1-4..
• Master Difficulty Level: Question Groups 1-8..
• Wizard Difficulty Level: Question Groups 1-12.

The questions from each group are shown below. Teachers are encouraged to view the questions (or do the Concept Builder) in order to judge which difficulty level is most appropriate for their classes. 

The Physics Classroom grants teachers and other users the right to print these questions for private use. Users are also granted the right to copy the text and modify it for their own use. However, this document should not be uploaded to other servers for distribution to and/or display by others. The Physics Classroom website should remain the only website or server from which the document is distributed or displayed. We also provide a PDF that teachers can use under the same conditions. We have included a link to the PDF near the bottom of this page.

 

Who Can See Who?

 
Question Group 1
Question 1
Observe the 5 students - A, B, C, D, and E - and an Eye position. Which students can be seen in the mirror from the given eye position?
 

 
 

 
Question 2
Observe the 5 students - A, B, C, D, and E - and an Eye position. Which students can be seen in the mirror from the given eye position?
 

 

 

 
Question 3
Observe the 5 students - A, B, C, D, and E - and an Eye position. Which students can be seen in the mirror from the given eye position?
 

 


 
Question Group 2
Question 4
Observe the 5 students - A, B, C, D, and E - and an Eye position. Which students can be seen in the mirror from the given eye position?