Question: Design a little dentists mirror to be fixed at the end of a shaft for use in the mouth of some happy soul. The requirements

Design a little dentist’s mirror to be fixed at the end of a shaft for use in the mouth of some happy soul. The requirements are (1) that the image be erect as seen by the dentist and (2) that when held 1.5 cm from a tooth the mirror produces an image twice life-size.

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