A -5.4 D lens is held 11.0 c m from an object 7.7 m m high. What is the position
ID: 3901755 • Letter: A
Question
A -5.4D lens is held 11.0cm from an object 7.7mm high.What is the position of the image? in front of the lens behind the lens Correct Part B Express your answer using two significant figures. di = -6.9 cm Correct Part C What is the type of the image? virtual, inverted real, inverted real, upright virtual, upright Correct Part DWhat is the height of the image? Express your answer using two significant figures. hi = mm A -5.4D lens is held 11.0cm from an object 7.7mm high.What is the position of the image? in front of the lens behind the lens Correct high.What is the position of the image? in front of the lens behind the lens Correct in front of the lens behind the lens in front of the lens behind the lens in front of the lens behind the lens Correct Correct Correct Part B Express your answer using two significant figures. di = -6.9 cm Correct Part B Express your answer using two significant figures. di = -6.9 cm Correct di = -6.9 cm di = -6.9 cm -6.9 Correct Correct Correct Part C What is the type of the image? virtual, inverted real, inverted real, upright virtual, upright Correct Part C What is the type of the image? virtual, inverted real, inverted real, upright virtual, upright Correct virtual, inverted real, inverted real, upright virtual, upright virtual, inverted real, inverted real, upright virtual, upright virtual, inverted real, inverted real, upright virtual, upright Correct Correct Correct Part D
What is the height of the image? Express your answer using two significant figures. hi = mm Part D
What is the height of the image? Express your answer using two significant figures. hi = mm hi = mm hi = mm in front of the lens behind the lens
Explanation / Answer
1/f = -1/5.4
1/u = 1/0.11
1/v = 1/f - 1/u
1/v = -1/5.4- 1/0.11 = 1/-0.11
1/v = 1/-0.11
Distance of image from the lens is v = -0.11 m
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Minus indicates virtual image.
Magnification m= v/u = -0.11/ 0.112 = -1.
size is the same as the object.
Hence height is the same as the object.
Minus sign indicates erect image.
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