Question

An object is 4cm high is placed at a distance of 10cm from a convex lens of focal length 20 find the position Nature and size of the image

Answer 1

Answer:

PLZ MARK AS BRAINLIEST

Answer 2

Answer:

Given : -

• An object is 4cm high is placed .

• a distance of 10cm from a convex.

• lens of focal length 20

To Find : -

• find the position Nature and size of the image

Solution : -

According to the formula : -

1/v - 1/u = 1/f

putting all values : -

1/v = 1/20 - 1/10

1/v = -1/20

v = -20

We have,

m = v/u

    = -20/-10

= 2

Also,

m = h'/h  

2 = h'/4

h' = 4 × 2

= 8cm.

Hence the the position Nature is 20 and size of the image is 8cm. .