The discussion revolves around determining the focal length of a convex mirror based on the relationship between object distance and image distance when the mirror is replaced with a flat mirror. The original poster presents a scenario where an object is placed 12.0 cm in front of a convex mirror, and the image distance changes when a flat mirror is used.
Participants are actively discussing the implications of the image distances for both types of mirrors. Some have provided calculations for the image distances and are questioning the signs associated with these distances, particularly in the context of virtual versus real images.
There is an ongoing exploration of the assumptions regarding the distances and the nature of the images produced by the mirrors. The discussion highlights the need for clarity on the definitions and signs used in the mirror equations.
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
?