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Ch 25 Q 30 Go.) A dentist’s mirror is placed 2.4 cm from a tooth. The...

Ch 25 Q 30 Go.) A dentist’s mirror is placed 2.4 cm from a tooth. The enlarged image is located 6.1 cm behind the mirror. (a) What kind of mirror (plane, concave, or convex) is being used? (b) Determine the focal length of the mirror. (c) What is the magnification? (d) How is the image oriented relative to the object?

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Answer #1

Part - a

The mirror used by density is a concave mirror because concave mirror forms a virtual image in the mirror that is enlarged.

Part - b

The focal length of the mirror can be found out by

by plugging the values we get

which gives us

Part - c

The magnification is

or

which gives us

Part - d

The image is behind the mirror and it is a virtual enlarged image. Thus it is upright w.r.t the object.

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