The image produced by a concave mirror is located 28 cm in front of the mirror. The focal length...

Question:

The image produced by a concave mirror is located 28 cm in front of the mirror. The focal length of the mirror is 14 cm. How far in front of the mirror is the object located? ..cm

Concave Mirror:

A concave mirror can form magnified, diminished as well as same size image as the object size, depending on the position of the object. When the object is located at the center of curvature, an inverted image of same size as the object forms at the center of curvature itself.

Answer and Explanation:

Given Data

  • Image distance from the concave mirror, v = 28 cm
  • focal length, f = 14 cm

Finding the object distance (u) from the concave mirror

Applying mirror equation:

  • {eq}\dfrac{1}{v} \ +\dfrac{1}{u}\ = \dfrac{1}{f} {/eq}
  • {eq}\dfrac{1}{28} \ +\dfrac{1}{u}\ = \dfrac{1}{14} {/eq}
  • {eq}u\ = 28\ cm{/eq}

Learn more about this topic:

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What is a Concave Mirror? - Definition, Uses & Equation

from Physics 101: Help and Review

Chapter 14 / Lesson 17
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