1. When projected through a single lens, the image of a movie on ascreen is: a.
ID: 1742390 • Letter: 1
Question
1. When projected through a single lens, the image of a movie on ascreen is:a. real andinverted
b. virtual andinverted
c. real andupright
d. virtual andupright
e. virtual and enlarged
2. A thin lens of focal length -12.5 cm has a 5.0 cm tall objectplaced 10 cm in front of it. What are the size and orientation ofthe image?
a. 4.0 cm,inverted
b. 4.0 cm,upright
c. 2.8 cm,inverted
d. 2.8 cm,upright
e. 100 cm, inverted
3. Two converging lenses, the first with focal length 10.0 cm andthe second with focal length 20.0 cm, are separated by 40.0 cm. Anobject, 3.00 cm in height, is placed 30.0 cm in front of the firstlens. Which of the following characteristics does the final imagehave?
a. real andupright
b. real andinverted
c. virtual andupright
d. virtual andinverted
e. none of those given
Explanation / Answer
1. real and inverted. 2. 1/v-1/u=1/f 1/v-1/-10=1/-12.5 v=-5.556cm m=v/u=I/O -5.556/-10=I/5 I=2.8cm Its the upright image as. c. For the first lens the image produced as, 1/v-1/u=1/f 1/v-1/-30=1/10 v=15cm The object disatnce for the next lens as u=40-15=25cm 1/v-1/-25=1/20 v=100cm Its real and upright image. Hence we get by it. "Hope this helps!Best of luck for the rest of yourcoursework."Related Questions
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