#3? H 23 8t? isvitual 7 Physics 2092 quiz cone -) (1) A convex mirror has a foca

Question

#3?

H 23 8t? isvitual 7 Physics 2092 quiz cone -) (1) A convex mirror has a focal length of magnitude 6.0 cm. (a) If the image is virtual, what is the object location for which the magnitude of the image distance is one third the reoaiae co cak o irdbe Print You Name Aaie D of the object distance? (b) Find the magnification of the image and state magnitude whether it is upright or inverted? fané om 12. ?,?,? (2) A concave shaving mirror has a radius of curvature of 30cim. It is positioned so that the (upright) image of a man's face is 3.0 times the size of the face. How far is the mirror from the face? (3)A certain LCD projector contains a single thin lens. An object 22.0mm high is to be projected so that its image fills a screen 1.80m high. The object-to-screen distance is 3.20m. (a) Determine the focal length of the projection lens. (b) How far from the objects should the lens of the projector be placed to form the image on the screen? ? 3.20m 03863 5 8282 p 81819 p 8182(0 03863) -3 16 m il.googie.cU

Explanation / Answer

3-

magnification = m = v/u

1.80/22*1000 = 81.818

so v = 81.818 u

a)

u + v = 3.20

82.818 u = 3.05

u = 0.0368 = 36.8mm

v = 3.01 m

f = uv/(u+v) = 81.818/82.818 * u = 81.818/82.818 * 36.8 = 36.35 mm

b)

distance = 36.8 mm

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