please answer #2 2. A real object is 9.0 cm from a converging lens with a focal
ID: 1732067 • Letter: P
Question
please answer #2
2. A real object is 9.0 cm from a converging lens with a focal length of 4.0 cm. a) At what distance from the lens is the imaged formed? (7 points) b) is the image real or virtual? How do you know? (3 points) c) If both sides of the lens have the same magnitude of curvature and the index of refraction in the lens material is 1.44, what is the curvature? (7 points) A convex mirror is placed 5.0 cm from the lens. The mirror has a radius of curvature of 30.0 cm. d) Is the object of the mirror real or virtual? How do you know? (3 points) e) At what distance from the mirror is its image formed? (7 points) f) Is the image of the mirror real or virtual? How do you know? (3 points) Bonus) Does the image from the mirror point in the same direction as the object for the lens? Explain. (2 bonus points)Explanation / Answer
2.
a)
do = object distance = 9 cm
f = focal length = 4 cm
di = image distance = ?
using the lens equation
1/di + 1/do = 1/f
1/di + 1/9 = 1/4
di = 7.2 cm
b)
the image is real since the image distance is coming out to be positive.
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