Question

A convex lens of focal length + 12 cm is take and an object is placed at a distance of 15cm. Find out the image distance.​

Answer 1

Answer:

0.15

Explanation:

• 1/f = 1/v+1/u
• 1/12 = 1/v+1/15
• 1/v = 1/12+1/15
• 1/v = 0.15m/s Answer
• sorry i did it with lens formula tge formula in this will be used
• 1/f = 1/v -1/u
• take object distance negative

Answer 2

Answer:

1/f = 1/v-1/u

1/12 = 1/v-1/(-15) *object distance is always negative*

1/12 = 1/v+1/15

1/12-1/15= 1/v

5-4/60=1/v

1/60=1/v

v=60cm

image distance is 60 cm.