Question

Complete the table below.

Trial	Object Distance (cm)	Object Size (cm)	Image Distance (cm)	Image Size/Orientation (cm)	Focal Length (cm)
1	11.25	2.00	87.75	15.5 / inverted
2	87.60	2.00	11.40	0.300 / inverted
3	23.35	XXX	17.65	XXX
4	17.55	XXX	23.45	XXX
XXX	XXX	XXX	XXX	Average
XXX	XXX	XXX	XXX	Std. Dev.

(5 points x 6 = 30 points)

1. Plot the 1/o (object distance) vs. 1/i (image distance) graph from all data collected. (10 points) What are the values of the x- and y- axis intercepts. (10 points) What are the meanings of the x- and y- axis intercepts. (10 points) Attach the plot here.

2. For the first two sets of data points only, use image and object distances to find the magnification at each position of the lens (magnification = M = -i/o). Then using your measurements of the image and objects sizes, find the magnification by the measured image and object sizes. (M = (image size)/(object size). Compare and comment on the four values of M. (10 points)

3. Are the images observed in this lab real or virtual? How do you know? (10 points)

Answer 1

the y axis is 1/i