Question

In: Physics

How far apart are an object and an image formed by an 75 −cm -focal-length converging...

How far apart are an object and an image formed by an 75 −cm -focal-length converging lens if the image is 3.40 × larger than the object and is real? Express your answer using two significant figures. do+di = cm

Expert Solution

Since the image is real, the magnification should be negative.

magnification =-3.4

Magnification m is defined as the ratio of image distance ( ) to object distance () or, image length( ) to object length ( )

Let the image distance from lens be and the distance of object from lens is

focal length of the lens,

The lens maker formula states that the the refractive index where the focus is present over the focal length is equal to the difference of refractive index where image is formed over the image distance and refractive index when object is kept over object distance.

image and object is formed in air and even the focus lies outside lens in air, refractive index of air is 1 so,

( in two significant figures)

The object and the image is 4.7*10^2cm distance apart.

genius_generous answered 2 years ago

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