Question

an object 5 cm high is kept 25 cm away from a convex lens of focal length 10cm. What is the nature,position and size of the image. plz and it soon

Answer 1

Hey!!!!!

For a convex lens, We have

h = 5cm
u = -25cm
f = +10cm
v = ?
m = ?
h' = ?

Thus By lens formula

1/f = 1/v - 1/u

=> 1/10 = 1/v + 1/25

=> v = 50/3

=> v = + 16.6cm

Now m = +v/u

=> m = 16.66/25

=> m = - 0.6

Thus image will be real, inverted and diminished.

Now m = h'/h

=> -0.6 = h'/5

=> h' = -3cm

Hope this helps