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Posted by on Thursday, March 29, 2012 at 9:33pm.

A spherical glass ornament is 7.00 cm in diameter. An object is placed 11.8 cm away
from the ornament.
a) Where will its image form?

b) What is the magnification of the image

  • Physics - , Thursday, March 29, 2012 at 11:32pm

    The focal length of the convex mirror surface is
    f = -R/2 = -1.75 cm

    For the image distance di, use
    1/do + 1/di = 1/f = -1/1.75
    1/di = -1/1.75 -1/11.8 = -0.6562
    di = -1.524 cm (1.524 cm behind the bulb surface)
    Magnification = |di/do| = 1.524/11.8
    = 0.129

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