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# problems_40 - PHY2061 R D Field Chapter 40 Problems Problem...

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PHY2061 R. D. Field Problems Chapter 40 Page 1 of 5 Chapter 40 Problems Problem 1: An object placed 180 cm in front of a spherical mirror produces an image with a magnification m = 0.1 . What happens to the image when the object is moved 150 cm closer to the mirror? Problem 2: A converging thin lens has a focal length of 30 cm . For what two object locations ( in cm ) will this lens form an image three times the size of the object? Problem 3: You decide to take a picture of the moon with your 35 mm camera using its normal lens of 50 mm focal length. Taking the moon°s diameter to be approximately 3.5x10 6 m and its distance from the earth as 3.84x10 8 m , how large ( in mm ) is the moon’s image on the film? Problem 4: Which of the following types of image of a real, erect object cannot be formed by a concave spherical mirror? (A) Real, erect, enlarged (B) Real, inverted, reduced (C) Virtual. erect, enlarged (D) Enlarged, inverted, and farther away than 2f (E) Virtual, inverted, reduced? Problem 5: A concave mirror forms a real image which is twice the size of the object. If the object is 20 cm from the mirror, the radius of curvature of the mirror ( in cm) must be approximately:

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PHY2061 R. D. Field Problems Chapter 40 Page 2 of 5 Problem 6:
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problems_40 - PHY2061 R D Field Chapter 40 Problems Problem...

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