Answer:
Explanation:
Given that,
An object is place 9cm in from of a concave mirror
Then, object distance is 9cm
u = 9cm
Focal length of the mirror is 6cm
Then, f = 6cm
A. We want to find image distance
Image distance v?
From mirror formula
1 / f = 1 / u + 1 / v
Where
f is focal length
u is object distance
v is image distance
1 / f = 1 / u + 1 / v
1 / 6 = 1 / 9 + 1 / v
1 / v = 1 / 6 - 1 / 9
1 / v = 1 / 18
Take reciprocal of both sides
v = 18 cm
Since the image distance is positive, then, the image is real.
B. Magnification M?
Magnification can be determined using
M = image distance / object distance
M = v / u
M = 18 / 9
M = 2
So, the image is double.
