Question

An object is placed at a distance of 15 cm from a concave lens of focal length 6 cm find the location nature and size of the image

Answer 1

Answer:

Given, F=6cm,Obj distance =15cm

Explanation:

Find Imagine position and Nature of the image =?

here F=-6cm because it measured in opposite direction

Also the Obj position = -15cm it also measured in opposite direction

so, Applying Lens formula

1/f= 1/v-1/u

-1/6=1/v-(-1/15)

-1/6=1/v+1/15

1/v=-1/6 - 1/15

1/v=

1/v=-15-6/90

1/v= -21/90

1/v= -4.28 CM

Nature of the image is VIRTUAL