Question

At what distance from a converging lens of focal length 12 cm, should an object be placed so that the magnification produced is -1 ?

Answer 1

Answer:

Magnification 1 means that the image distance is the same as the object distance and the size of image is the same as the object. This happens only if the position of the object is at 2f, i.e, focal length.

Thus, the object must be placed at a distance of 24 cm ( 2 × 12 ) from the converging lens.

Answer 2

Photosynthesis is important to living organisms because it is the number one source of oxygen in the atmosphere. Without photosynthesis, the carbon cycle could not occur, oxygen-requiring life would not survive and plants would die.