Question

1. apply student a sits in a chair facing a mirror and sees the reflection image ( b ) of student ( b ) in the mirror. show the actual position of student ( b ).

Explanation:

Step1: Use the property of mirror reflection

The image in a mirror is symmetric with respect to the mirror. So, to find the actual position of Student \( B \), we need to find the point that is symmetric to \( B' \) with respect to the mirror.

Let the mirror be the line of symmetry. If we consider a point \( B' \) (the image), then the actual point \( B \) is such that the mirror is the perpendicular bisector of the line segment joining \( B \) and \( B' \).

Answer:

Draw a perpendicular from \( B' \) to the mirror. Measure the distance from \( B' \) to the mirror along this perpendicular. Then, on the opposite side of the mirror (from \( B' \)), mark a point \( B \) at the same distance from the mirror as \( B' \) is. This marked point \( B \) is the actual position of Student \( B \).