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Question 1 True or False: The subscripts o and i are used to denote quantities related to the object and image.
Question 2 The variables ho and hi are used to indicate the size (or height) of the object and image, respectively, in a ray diagram. A positive value is used when an object or image tip lies above the optic axis and a negative value is used when it is below.
True or False: The image is said to be erect when ho and hi have opposite signs and inverted when ho and hi have the same signs.
Question 3 True or False: The quantities di and do are measured from the focal point of a lens or mirror.