AP Physics 2 : AP Physics 2

Study concepts, example questions & explanations for AP Physics 2

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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.

Possible Answers:

Correct answer:

Explanation:

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.

Possible Answers:

Correct answer:

Explanation:

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.  

Possible Answers:

Correct answer:

Explanation:

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.

Possible Answers:

Correct answer:

Explanation:

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.

Possible Answers:

Correct answer:

Explanation:

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.

Possible Answers:

Correct answer:

Explanation:

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.

Possible Answers:

Correct answer:

Explanation:

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?

Possible Answers:

There will be no image

Real

Virtual

Cannot be determined without knowing the index of refraction

Correct answer:

Virtual

Explanation:

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.

Possible Answers:

Correct answer:

Explanation:

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.

Possible Answers:

Correct answer:

Explanation:

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:

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