Physics equations/25-Geometric Optics/Q:vision

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Quiz

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1 Which lens has the shorter focal length?

	They have the same focal lengh.

2 If this represents the eye looking at an object, where is this object?

	One focal length in front of the eye
	Two (of the other answers) are true
	very far away
	at infinity
	directly in front of the eye (almost touching)

3 After passing through a the lens of a camera or the eye, the focal point is defined as where the rays meet.

	true
	false

4 Mr. Smith is gazing at something as shown in the figure to the left. Suppose he does not refocus, but attempts to stare at the star shown in the figures below. Which diagram depicts how the rays from the star would travel if he does not refocus?