Lens experiment

 We used an illuminated triangle on a ray box to produce an object for a lens. The lens produced an image which we projected onto paper (above)

 The height of the object was always 32mm but the height of the image depends on how close the triangle is to the lens. The closer the object is to the lens, the further the image is from the lens and the bigger the image is. We could tell when the image was properly focused by the cross-hair. The image was always inverted. We calculated the magnification by doing height of image/height of  object.