1.) Consider the image formed by a thin diverging lens. Decide if the image will
ID: 1309514 • Letter: 1
Question
1.) Consider the image formed by a thin diverging lens. Decide if the image will always, sometimes, or never meet each of the following conditions.
(a) inverted
never, always, sometimes,
(b) upright
never, always, sometimes,
(c) real
never, always, sometimes
(d) virtual
never, always, sometimes
(e) larger than the object
never, always, sometimes
(f) smaller than the object
never, always, sometimes
2.) A bright object and a viewing screen are separated by a distance of 72 cm. At what locations between the object and the screen should a lens of focal length 13 cm be placed in order to produce a crisp image on the screen? [Hint: First draw a diagram.]
_____cm
3.) A certain lens focuses light from an object 2.00 m away as an image 48.3 cm on the same side of the lens. What type of lens is it?
converging lens or diverging lens?
What is its focal length?
_____cm
Is the image real or virtual?
virtual or real?
4.) (a) How far from a 52.4 mm focal-length lens must an object be placed if its image is to be magnified 2.20? and be real?
_____ mm
(b) What if the image is to be virtual and magnified 2.20??
______ mm
_____cm
Explanation / Answer
1) a) never
b) always
c) never
d) always
f) sometimes
g) sometimes
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