Lens

Object Distance (cm)	Image Distance (cm)	Characteristics
5	-10	Large, upright, virtual
10	None	Small, inverted, real
15	30	Large, inverted, real
20	20	Same, inverted, real
25	16.7	Small, inverted, real

Mirror

Object Distance (cm)	Image Distance (cm)	Characteristics
10	-30	Same, upright, virtual
15	None	Large, inverted, real
20	60	Same, inverted, real
25	37.5	Large, inverted, real
30	20	Same, inverted, real
25	26.25	Large, inverted, real

Using data above, answer questions:

1. Use any data of your choice and the lens/mirror equation to calculate the focal lengths for both the convex lens and the concave mirror.

2. In one or two sentences, compare the data you collected in Table 1 and Table 2.

3. When it comes to how ray lines are drawn, what makes the convex lens and concave mirror similar to each other?

4. What range of d_o values will result in a real image? Infer this information for both the lens and mirror based on the data collected. Report these ranges in terms of f and/or 2f. For example, "When d_o is less than 2f."

5. What range of d_o values will result in a virtual image? Infer this information for both the lens and mirror based on the data collected. Report these ranges in terms of f and/or 2f. For example, "When d_o is less than 2f."

6. What does it mean when d_i is negative?

7. What happens when d_o = f?

8. What range of d_o values will result in a smaller image? Infer this information for both the lens and mirror based on the data collected. Report these ranges in terms of f and/or 2f. For example, "When d_o is less than 2f."