1. T/F: A converging lens has a negative focal length.
False. A converging lens has positive focal length. A diverging lens
produces a virtual image (usually upright); converging lens usually
produces inverted, real image.
2. Suppose a positive lens has a focal length f = 20cm
and an object is placed at a distance of do = 50cm
from this lens. Please calculate the image distance
di for this situation.
3. For the above scenario, is the image virtual or
real? Suppose the height of the object is
ho = 10cm and the height of the image is
hi = -16.7cm. Is the image inverted or
Converging lens so real; negative mag. so inverted
4. Draw a diagram of the eye. Please be sure to include at least the
retina, iris, cornea, and lens.