Question

an object is placed at a distance of 15 cm from a convex lens the magnification of the image is -2 then the image distance is
a. 50cm
b.-50cm
c.12.5cm
d.-12.5cm​

Answer 1

Answer:

Given that u=−15cm f=20cm

Given that u=−15cm f=20cm Now by lens formula

Given that u=−15cm f=20cm Now by lens formula f

Given that u=−15cm f=20cm Now by lens formula f1

Given that u=−15cm f=20cm Now by lens formula f1

Given that u=−15cm f=20cm Now by lens formula f1 =

Given that u=−15cm f=20cm Now by lens formula f1 = v

Given that u=−15cm f=20cm Now by lens formula f1 = v1

Given that u=−15cm f=20cm Now by lens formula f1 = v1

Given that u=−15cm f=20cm Now by lens formula f1 = v1 −

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v1

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v1

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v1 =

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v1 = 10

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v1 = 101

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v1 = 101

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v1 = 101 −

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v1 = 101 − 20

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v1 = 101 − 201

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v1 = 101 − 201

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v1 = 101 − 201

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v1 = 101 − 201 ⇒v=20cm

Given that u=−15cm f=20cm Now by lens formula f1 = v1 − u1 v1 = 101 − 201 ⇒v=20cmThe image gets formed at 20 cm to the right of the lens and it will be diminished, inverted and real in nature.