# phys270-quiz7-soln.pdf - PHYS270 Electrodynamics Light ...

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PHYS270Electrodynamics, Light, Relativity and Modern PhysicsSpring 2018Quiz 7An object sits upright in front of a concave spherical mirror with radiusR= 32.0 cm. Theobject is 6 cm tall and is a distance of 24 cm from the center of the mirror, sitting on theoptical axis.1. What is the location of the image of the object? (3 pts)2. How tall is the image? (3 pts)3. Is the image real or virtual? Upright or inverted? (2 pts)
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2 pts, 16 cm, 2 m, 12 cm, 24 cm

Unformatted text preview: Potentially Useful Things f = R 2 1 f = 1 s + 1 s m =-s s (1) f = R 2 = 32 cm 2 = 16 cm 1 f = 1 s + 1 s ⇒ 1 16cm-1 24cm = 1 s ⇒ s = 48 cm (2) m =-s s =-48 24 =-2 m = h h ⇒ h = mh = (-2)6 cm =-12 cm (3) Magnification m is negative ⇒ image is inverted . Rays converge; image on same side of mirror as object ⇒ image is real . See ray diagram above....
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