You wish to reflect sunlight from a mirror onto some paper under a pile of wood in order to start a fire. Which would be the best choice for the type of mirror?
Check your answer: A. concave
Practice 15.2.2
The diagram shows three light rays reflected off of a concave mirror. Which ray is NOT correct?
Check your answer: C
Practice 15.2.3
The image produced by a concave mirror of a real object is…
Check your answer: C. sometimes real and sometimes virtual.
Practice 15.2.4
The image produced by a concave mirror of a real object is…
Check your answer: C. sometimes upright and sometimes inverted.
Practice 15.2.5
The image produced by a convex mirror of a real object is…
Check your answer: B. always virtual.
Practice 15.2.6
The image produced by a convex mirror of a real object is…
Check your answer: A. always upright.
Practice 15.2.8
When you hold a spherical concave mirror with a 48.2-cm radius of curvature in front of your face, you see an image of your face that is 61.8 cm in front of the mirror. What is the distance between the mirror and your face?
Check your answer: A. 39.5 cm
Practice 15.2.9
When you hold a spherical concave mirror with a 48.2-cm radius of curvature 39.5 cm in front of your face, you see an image of your face that is 61.8 cm in front of the mirror. What is the magnification of this image?
Check your answer: C. -1.56
Practice 15.2.10
When you hold a spherical concave mirror with a 48.2-cm radius of curvature 19.4 cm in front of your face, you see an image of your face in the mirror. Where is this image located, with respect to the mirror?
Check your answer: B. 99.5 cm behind the mirror
Discuss!
An automobile rear-view mirror shows an image of a truck at a time when the truck is 3.0 m from the mirror. The focal length of the mirror is -0.58 m.
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