PHY 2202 General Physics II
Homework 4-2 Ray Optics
1. A converging lens has focal length f= 150 mm. A small object of size
ho= 1 cm is placed at the distance do= 250 mm away from the lens.
Calculate the size of the image hi, and the distance of the image from
the lens di. Is this image real or virtual? Is this image erect or inverted?
2. A diverging lens has focal length f=−100 mm. A small object of size
ho= 1 cm is placed at the distance do= 300 mm away from the lens.
Calculate the size of the image hi, and the distance of the image from
the lens di. Is this image real or virtual? Is this image erect or inverted?
(Ver. 05/2024)