Question 1 

1/do + 1/di = 1/f

Use the thin lens equation to predict the distance of the images for case #1, #2 and #3 given the following information:

Type of Lens	Focal Length (cm)	Object Height (cm)	Object Distance (cm)
Convex	3	2.0	6.0
Concave	4	2.0	4.0
Concave	4	1.5	2.0

Blank 1 --------

Blank 2 --------

Blank 3 --------

Question 2 

M=hi/ho=−di/do          1/do+1/di=1/f

A convex lens has a focal length of 10 cm.  A candle is located 15 cm from the lens.  

#1 What is the image distance?

#2 What is the magnification?

Question 3 

M=hi/ho=−di/do          1/do+1/di=1/f

A convex lens has a focal length of 10 cm and a small block is placed 5 cm in front of it.  The height of the block is 5 cm.    

#1 What is the image distance?

#2 What is the image height?

Image characteristics fill the chart 

Object Position	Image Position (closer, further, same)	Orientation (Upright or Inverted)	Size (Smaller, Same, or Larger than Object)	Type (Real or Virtual)
Beyond 2F
At 2F
Between 2F and F
At F
Between F and the lens