Question

state the details of the nature, size and position of the image formed by a convex lens of focal length 20 cm when the object is kept at the distance of 30 cm. ( please write in full form )​

Answer 1

Answer:

• The position of the image is on the other side of lens 60 cm away from it.
• Size is reduced by factor of 2 as the size of object (Diminished).
• Nature of the image is Real and inverted.

Explanation:

focal length,f = 20 cm

object distance,u = -30 cm

Using lens formula,

1/f = 1/v - 1/u

=> 1/v = 1/f + 1/u

= 1/20 - 1/30

= 1/60

v = 60 cm

Image distance, v = 60 cm

Using magnification for lens,

m = v/u

= 60/-30

= -2

Answer 2

Answer:

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