3. Complete Activity 11.3 (Page 126). Take a chess board. If a chess board is not available, draw on a chart paper 64 (8 × 8) squares of equal size. Draw a thick line in the middle of the paper. Fix a plane mirror vertically on this line. Place any small object, such as a pencil sharpener, at the boundary of the third square counting from the mirror. Note the position of the image. Now shift the object to the boundary of the fourth square. Again note the position of the image. Did you find any relation between the distance of the image from the mirror and that of the object in front of it?
Answer:
The activity can be carried out as follows:
Aim: To find the relation between the distance of the image from a plane mirror and that of the object in front of it.
Materials Required: Chess board or chart paper, plane mirror, two pencil sharpeners.
Procedure:
(i) Take a chess board and place a plane mirror at one edge. If a chess board is not available draw 64 (8 × 8) squares of equal size on the chart paper, draw a thick line in the middle of the paper and fix a plane mirror vertically on this line.
(ii) Place a pencil sharpener, at the boundary of the third square counting from the mirror and note the position of the image.
(iii) Now shift the same sharpener or place a different sharpener at the boundary of the fourth square counting from the mirror and again note the position of the image.
Observations: You will find that in the case of both sharpeners the distance of the image behind the mirror is the same as the distance of the sharpener (object) in front of the mirror. This is shown in the figure below:
Conclusions: We conclude that the distance of the image formed in a plane mirror is the same as the distance of the object in front of it.
“Take a chess board. If a chess board is not available, draw on a chart paper 64 (8 × 8) squares of equal size. Draw a thick line in the middle of the paper. Fix a plane mirror vertically on this line. Place any small object, such as a pencil sharpener, at the boundary of the third square counting from the mirror. Note the position of the image. Now shift the object to the boundary of the fourth square. Again note the position of the image. Did you find any relation between the distance of the image from the mirror and that of the object in front of it?” – Solved.
Related Links:
Solution to Extended Learning Problem 1
Solution to Extended Learning Problem 2
Solution to Extended Learning Problem 3
Solution to Extended Learning Problem 4
Solution to Extended Learning Problem 5
Solution to Extended Learning Problem 6
Solution to Activity 11.1
Solution to Activity 11.2
Solution to Activity 11.3
Solution to Activity 11.4
Solution to Activity 11.5
Solution to Activity 11.6
Solution to Activity 11.7
Solution to Activity 11.8
Solution to Activity 11.9
Solution to Activity 11.10
Solution to Activity 11.11
Solution to Activity 11.12
