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Unformatted text preview: Name: Class: Date: ID: A t2q3 Multiple Choice
Identiﬁl the letter of the choice that best completes the statement or answers the question. 1. What is the minimum size of a wallmounted mirror in order to view the upper half of ones height, h? a. h b. h/2
h/4 d. h/3 e. The answer is not given. 2. An object placed 12 cm from a concave mirror produces a real image 8.0 cm from the mirror. If the
object is now moved to a new position 18.0 cm from the mirror, where is the new image located as measured from the mirror? 3 \ l, \ I , a. 3.0 cm T}bm T ’ E /> i: 3 la/ C W‘ ® 6.5 cm CW 5 c. 9.2 cm \ S
l _ , d. 14.6 cm / + r — ’ :: I , G e. 17.1 cm ’KCV" i a“ D Igcw‘ 3. An object is held at a distance of 12 cm from a convex mirror creating an image that is 1/3 the object size. What is the focal length of the mirror? \ Ca)—6.0cm W ‘ \ +/ 1, :>l/ __'\_(\_§\ b. —3.0 T ‘ 5 é‘af‘sf > )J‘Lh ,C llgk ‘6: Q C. —9.0 cm ‘ ' ” V L d. 18 cm : 1 _ (3 C, 1M e. —24 cm 7 ‘C 4. Sally places an object 6.0 cm from a thin convex lens along its axis. The lens has a focal length of 9.0
cm. What are the respective values of the image distance and magniﬁcation? a. —18 cm and 3.0 , ~ (I? 18cmand3.0 L Jr) 3 i 3 l 3 “‘8”? c. 3.0 cm and —0.50 (aw. i ‘10“ , d. —18 cm and —3.0 ,_ ~43»; :30“ 'i’ii ‘3 5
e. —18 cm and —0.50 ' (7cm, 5. Two thin lenses with focal lengths 25.0 cm and 30.0 cm are placed in contact in an orientation so that
their optic axes coincide. What is the focal length of the two in combination? Hint: A thin lens is one
whose thickness is negligible. ‘ @13.6cm ;L:\ AV: j» b. 27.5 cm Z L
c. 55.0 cm ‘F ‘ 3
d. 150 cm
e. 175 cm
6. What is the image distance of an object 1.00 m in front of a converging lens of focal length 20.0 cm? +16.7 cm \ ,— a. .
b. +20.0cm l, 3(.\/: I. :7 \ : ,1‘3,C,'vn
@ +25.0cm wow 1; goem /
d. +333 cm e. +37.5 cm Name: ID: A 7. A nearsighted person cannot see objects clearly beyond 30 cm (the far point). If the patient has no
astigmatism and contact lenses are prescribed, what is the power of the lens required to correct the patient's vision? L” 3"“ 7 a. —2.0 diopters A _ o h
a) —3.3 diopters ~ f 3 5 3\
c. —4.0 diopters : __l__ : ‘ Ana F (V?
d. —5.0 diopters 3 " — . am e. —6.0 diopters (“WC Wahl Pau’txlkl («‘15 ‘
+0 Aurw a Crew +1! lens as ;.C ﬁn“, Can‘4 (him 30¢mﬂuq7>
8. A thin lens has a focal length of 10. cm for red light. If the index of refraction for the lens material '
tends to decrease with increasing wavelength, what is the focal length of the lens for blue light?
a. also 10.00 cm Lb). less that 10.00 cm
0. more than 10.00 cm
(1. It depends on whether the lens is converging or diverging. ‘Blm l'vxS Skm¥r W“V<\c:7+k ’36 kl" w‘u \«mw CA lﬁ‘tjlv'l‘ 'MLC" O‘c R£n°lléV\» ...
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 Spring '11
 Wethien

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