The figure below shows how a convex lens forms an image of an object on a grid where each small square represents 1 unit of length.
a.[1]
Which point on the figure marks the position of the principal focus of the lens? Choose from: A, B, C, D.
b.[2]
Which two words describe the image formed? Choose from:
- Enlarged
- Inverted
- Real
- Upright
- Virtual
c.[2]
Calculate the magnification produced by the lens. Use the equation:
magnification=image heightobject height \text{magnification} = \frac{\text{image height}}{\text{object height}} magnification=object heightimage heightd.[1]
Complete the sentence by choosing from: decrease, increase, not change: "As the object is moved further away from the lens, the size of the image will __________."