Is Snoopy right with his warning to Woodstock?
Apparent depth is found from
di = - do (n1/n2)
In most cases, we will be concerned with the apparent depth of an image viewed from air where n1 = 1. Then the apparent depth is given by
di = - do (1/n2)
Remember, the minus sign tells us this is a virtual image.
All of this means that Charles Schulz's line for his Peanuts cartoon should read as this --
Suppose you stand in a swimming pool and look down at your toes and find that they appear to be 0.75 m below the water's surface. How deep is the water?
Return to Ch 24, Mirrors and Lenses (c) Doug Davis, 2003; all rights reserved