Question

An object is placed 10cm from a concave lens of focal length 6 cm. Find the position of the image. Draw the corresponding ray diagram

Answer 1

see diagram as shown in figure, here you can see position of object , position of image and and complete ray diagram.

given, focal length of concave mirror, f = -20 cm

distance of object from the mirror, u = -10 cm

use formula, 1/v + 1/u = 1/f

or, 1/v = 1/f - 1/u

or, 1/v = 1/-20 - 1/-10

or, 1/v = -1/20 + 1/10 = 1/20

or, v = +20cm

hence, image position is 20cm right side from the pole of concave mirror as shown in diagram.

Answer 2

Answer:

-15 cm

Explanation:

focal length = -6

u = -10

by lens formula

1/f =1/u + 1/v

1/-6 =1/-10 + 1/v

-1/6 + 1/10 = 1/v

-5 + 3/30 = 1/v

-2/30 = 1/v

-1/15 = 1/v

v = -15

Image will be between f and 2f

find the attachment pls