Question

If an object is placed at 30 cm from lens convex lens which has a focal length of 10cm then what should be the distance of image so formed ?

1 15 cm from lens

2 between 10 and 20 cm from lens

3 more than 20 cm from lens

4at 10 cm from lens ​

Answer 1

Answer:

answer is option 1

Explanation:

u= -30cm

f= 10 cm

by lens formula

1/v-1/u=1/f

rearranging

v=(fu)/(f+u)

substituting we will get v = 15 cm