Lenses

At the end of this activity, students should be able to:
– explain the principle of the formation of images by lenses
– define focal point and focal length
– calculate the image distance and the size of an image when the size of the object and its distance are given
– define the power of a lens
– determine the focal point given the shape of a lens and its refractive index
– calculate the magnification
– use the lens formula.