Get the Gizmo ready: -25
Activity C:
Magnification
. Check that the Concave mirror is selected
• Move the light bulb to -15 and the focal point to -10.
Introduction: Mirrors are often used to change the size of an image. The magnification of an
image is equal to the ratio of the image height to the object height. Some mirrors, such as the
mirrors in reflecting telescopes, produce images that are greatly magnified. Other mirrors, such
as the mirrors in side-view mirrors on cars, produce images that are reduced in size.
Question: What determines the magnification of an image?
1. Measure: What are the current values of these variables?
do -
f =
di =