You hold a metal spoon about 25 cm from your face and look at your own...
You hold a metal spoon about 25 cm from your face and look at your own reflection off the back of the spoon. The surface you view is convex with focal length 5 cm. Is the image you see real or virtual? Is the image you see inverted or upright?
Homework Answers
Given,
o = 25 cm ; f = -5 cm
we know from lens eqn
1/f = 1/i + 1/o
i = o x f/(o - f)
i = 25 x -5/(25 + 5) = -4.17 cm
The image is VIRTUAL.
M = -i/o = -(-4.17)/25 = 0.17
The image is UPRIGHT.
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