Question

solve this please

solve anyone part I just want the idea of how to solve this​

Answer 1

Answer:

GiveN :

Object Height (ho) = 4 cm

Object Distance (u) = - 15 cm

Convex lens

Focal length (f) = 20 cm

Solution :

We know that lens formula is

1/f = 1/v + 1/u

GiveN :

Object Height (ho) = 4 cm

Object Distance (u) = - 15 cm

Convex lens

Focal length (f) = 20 cm

_____________________

To FinD :

Size, position and nature of Image

Magnification

______________________

SolutioN :

We know that Lens formula is

1/f = 1/v + 1/u

1/v = 1/f - 1/u

1/v = 1/20 - (-1/15)

1/v = 3 + 4 / 60

1/v = 7/60

v = 8.5

Image Distance is 8.5 cm

As we know that

Magnification = -v/u

⇒m = -8.5/-15

⇒m = 0.5

Magnification is + 0.5

Image size is diminished

Nature is Virtual and erect