Question

a convex lens of focal length 8 cm from a real image of the same size as the object what is the distance between the object and the image​

Answer 1

BASIC OPTICS

We know that image is of same hight than that of the object (in lenses) only when the obj. is placed AT 2F1(C).

AND A COMMON FORMULA WE KNOW IS THAT

2*F approximately equals RADIUS OF CURVATURE....

THEREFORE, distance btw obj and lens is — 2*8

. = 16cm.

AND SINCE THE IMAGE IS AS FAR FROM LENS AS OBJ IS:—

DISTANCE BTW OBJ AND IMAGE IS 2*16

. = 32

HOPE IT HELPS

PLZ RATE BRAINLIST!!

Answer 2

Answer:

2F+2F

Explanation:

We know that if the object is placed at 2F then only the image is said to be real and same size of the object.

The solution is very easy,

2F+2F=4F (F=8) {You ask why we got 2F+2F?, I have mentioned it in the above lines}

4F= 4×8

=36cm.