The focal length of a convex mirror can be determined using the object distance and the image distance derived from the problem statement. An object placed 12.0 cm in front of the convex mirror results in a virtual image located 7.0 cm behind the mirror. The flat mirror, positioned 5.0 cm farther away, produces an image at 12.0 cm. Applying the mirror formula, 1/do + 1/di = 1/f, yields a focal length of -0.12 m for the convex mirror, confirming that the image is virtual.
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aChordate said:Homework Statement
An object is 12.0 cm in front of a convex mirror. When the convex mirror is replaced
with a flat mirror, the image distance is 5.0 cm farther away from the mirror. What is the
focal length of the convex mirror?
Homework Equations
f=-1/2R
1/do+1/di=1/f
The Attempt at a Solution
(1/0.12m)+1/di=1/f
?
12+5cm=17cm=0.17m
(1/0.17m)+1/di=1/f
?
ehild said:How is the image distance related to the object distance in case of a flat mirror?
ehild
The image is at 7 cm distance from the mirror, but the mirror is convex, is the image virtual or real?aChordate said:di=12cm for the flat mirror
di=7cm for the convex mirror?
aChordate said:Homework Statement
An object is 12.0 cm in front of a convex mirror. When the convex mirror is replaced
with a flat mirror, the image distance is 5.0 cm farther away from the mirror. What is the
focal length of the convex mirror?
Homework Equations
f=-1/2R
1/do+1/di=1/f
The Attempt at a Solution
(1/0.12m)+1/di=1/f
?
12+5cm=17cm=0.17m
(1/0.17m)+1/di=1/f
?