Question

For each of the following descriptions: Draw the 3 principal rays to locate the image. Then, using your drawing Give the image height in centimeters Give the image distance from the lens in centimeters 7) An object is placed 6 cm to the left of a converging lens that has a focal length of 3 cm. 8) An object is placed 3 cm to the left of a converging lens that has a focal length of 9 cm. 9) The focal length of a diverging lens is 6 cm. An object is placed 6 cm from this lens. 10) An object is placed at twice the focal length of a diverging lens. The focal length of the lens is 3 cm.

Answer 1

here , i have drawn rough diagram and i tried to give complete idea.

using three rays one ray should be parallel to axis and other two should pass through focus,joining the three we get image.

i assumed height of image as h and found out height of image in terms of h. i used lens formula and magnification formula to find the image position and
Imege hergnt lnage istemed IS tasshan Objeet m bho fane mleitptRens 1 -! 3 투 우우 ·수 Ve -3 3cm lett od lens tmage tore니 twmage heigut is n om 2f Image hegut n Cm Image fomed Var2 2cmfeftet a. 6 3

20 2f Image vs loateel 6cm Rons age hegut 5 same as thet a object ho 2- T T 29 'Image heagut bigger thnobid heiut -2 3ra a 3 .는. 두-부.국·후-수 image femed Is .Scm Ret af Renst heightof 5lect is henwnereet nage will be
height of image

thank you