The mirror formula is
1/v + 1/u = 1/f
u is the object distance
v is the image distance
du = |u1 – u2| = L
Differentiating on the both sides we get,
dv/v2 = -du/u2
v/u = f/u-f
du = L, therefore, image length is f2/(u-f)2L
The mirror formula is
1/v + 1/u = 1/f
u is the object distance
v is the image distance
du = |u1 – u2| = L
Differentiating on the both sides we get,
dv/v2 = -du/u2
v/u = f/u-f
du = L, therefore, image length is f2/(u-f)2L