Friday
March 24, 2017

Post a New Question

Posted by on Saturday, January 7, 2012 at 3:25pm.

An object that is 27 cm in front of a convex mirror has an image located 18 cm behind the mirror. How far behind the mirror is the image located when the object is 19 cm in front of the mirror?

  • Physics - , Saturday, January 7, 2012 at 4:12pm

    Compute the focal length (f) from the object and image information provided.

    Then use that f (which will be negative for a convex mirror) to compute the new image position when the object is moved.

    1/27 - 1/18 = 1/f
    2/54 - 3/54 = -1/54 = 1/f
    f = -54 cm


    1/19 + 1/Di = -1/54
    1/Di = -1/54 - 1/19 = -0.007115
    = -1/14.05
    Di = -14.05 cm
    which means 14.05 cm behind the mirror

  • Physics - , Saturday, February 11, 2012 at 11:54pm

    An object that is 29 cm in front of a convex mirror has an image located 13 cm behind the mirror. How far behind the mirror is the image located wen the object is 15 cm in front of the mirror?

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question