From the lens equation calculate the position of the following images produced by a convex lens. Draw a ray diagram in each case and state whether the image are real or virtual and also if they are
upright or inverted
a. U= 5 cm and f= 2 cm
b. u = 10mm; f = 15mm
c. u = 3 cm ; f = 4 cm

Calculate the position of the images formed by the following concave lenses.
a. For an object with u = 6 cm if the focal length is - 2 cm
b. For an object with u = 4 cm if the focal length is -8 cm
c. For an object with u = 240mm if the focal length is - 8 cm

Explanation:

(i)

O is the object and I is the image.

The image formed is enlarged and it is erect. So the magnification will be positive (+) and greater than 1.

Refer above image. 1

(ii)

O is the object and I is the image.

The image formed is diminished and erect. So the magnification will be positive (+) and less than1.

Refer above image. 2

(iii)

The image will be formed as the 2F on the other side of the lens and it will be of same of the object.

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )