Reviewing Pinhole Phenomena

We gave each group a white board and a pinhole scenario to sketch and solve for various measurements. Emily took the pinhole scenarios from a “Pinhole Camera Day” website (http://www.pinholeday.org/). She assigned each group a specific picture from the website to use for reference.

After drawing a few sketches, each of the groups was able to come up with the equation:
H/D = h/d
Where:

• H = Height of object
  
• D = Distance from object to pinhole
  
• h = Height of image
  
• d = Distance from pinhole to image