All AP Physics 2 Resources
Example Questions
Example Question #12 : Optics
An object of height is placed in front of a convex mirror that has a radius of curvature of .
Determine the size of the image.
Use the mirror/lens equation:
Where:
is the object distance from the mirror, which is taken to be negative number
is the image distance from the mirror
is the focal length of the mirror, which for convex mirrors is taken to be negative number
is the radius of curvature of the mirror
Plug in values:
Solve for :
Use the equation for magnification:
In this equation:
is magnification
is image height
is object height
Plug in values and solve for :
Example Question #1 : Mirrors
An object of height is placed in front of a concave mirror that has a radius of curvature of . Determine the focal length of the mirror.
Use the relationship for concave mirrors:
Where:
is the object distance from the mirror
is the image distance from the mirror
is the focal length of the mirror
is the radius of curvature of the mirror
Plug in values:
Solve for :
Example Question #1 : Mirrors
An object of height is placed in front of a convex mirror that has a radius of curvature of .
Determine the distance of the image.
Use the mirror/lens equation:
Where:
is the object distance from the mirror, which is taken to be negative
is the image distance from the mirror
is the focal length of the mirror, which is taken to be negative for convex mirrors
is the radius of curvature of the mirror
Plug in values:
Solve for the image distance:
Example Question #1 : Mirrors
An object of height is placed in front of a convex mirror that has a radius of curvature of .
Determine the focal length of the mirror.
Use the mirror/lens equation:
Where:
is the object distance from the mirror, which is taken to be negative
is the image distance from the mirror
is the focal length of the mirror, which is taken to be negative for convex mirrors
is the radius of curvature of the mirror
Plug in values:
Solve for the focal length:
Example Question #2 : Mirrors
An object of height is placed in front of a concave mirror that has a radius of curvature of .
Determine the magnification of the image.
Use the mirror/lens equation:
Where:
is the object distance from the mirror, which is taken to be negative
is the image distance from the mirror
is the focal length of the mirror, which for concave mirrors is taken to be positive
is the radius of curvature of the mirror
Plug in values:
Solve for the image distance:
Use the magnification equation:
Where
is magnification
is image height
is object height
Plug in values and solve for magnification:
Example Question #431 : Ap Physics 2
An object of height is placed in front of a concave mirror that has a radius of curvature of .
Determine the focal length of the mirror.
Use the mirror/lens equation:
Where:
is the object distance from the mirror, which is taken to be negative
is the image distance from the mirror
is the focal length of the mirror, which for concave mirrors is taken to be positive
is the radius of curvature of the mirror
Plug in values and solve for the focal point:
Example Question #11 : Optics
An object of height is placed in front of a concave mirror that has a radius of curvature of .
Determine the distance of the image.
Use the mirror/lens equation:
Where:
is the object distance from the mirror, which is taken to be negative
is the image distance from the mirror
is the focal length of the mirror, which for concave mirrors is taken to be positive
is the radius of curvature of the mirror
Plug in values and solve for the image distance:
Example Question #21 : Optics
An object of height is placed in front of a concave mirror that has a radius of curvature of . Will the image be real or virtual?
There will be no image
Real
Virtual
Cannot be determined without knowing the index of refraction
Virtual
Use the relationship between focal length and radius:
Plug in values.
Based on the properties of a concave mirror, objects inside the focal length of the mirror will generate virtual images.
Example Question #432 : Ap Physics 2
An object of height is placed in front of a convex mirror that has a radius of curvature of .
Determine the magnification of the image.
Use the mirror/lens equation:
Where:
is the object distance from the mirror, which is taken to be negative number
is the image distance from the mirror
is the focal length of the mirror, which for convex mirrors is taken to be negative number
is the radius of curvature of the mirror
Plug in values:
Solve for :
Use the equation for magnification and solve for magnification, :
Example Question #14 : Mirrors
An object of height is placed in front of a concave mirror that has a radius of curvature of .
Determine the size of the image.
Use the mirror/lens equation:
Where:
is the object distance from the mirror, which is taken to be negative
is the image distance from the mirror
is the focal length of the mirror, which for concave mirrors is taken to be positive
is the radius of curvature of the mirror
Plug in values:
Solve for the image distance:
Use the magnification formula:
Where
is magnification
is image height
is object height
Plug in values and solve for the image height: