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light-reflection and refraction — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10Sciencelight-reflection and refraction2 Marks
Question
State the mirror formula and write it mathematically.
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Answer

  • The relationship between the object distance $(u)$, the image distance $(v)$ and the focal length $(f)$ of a mirror is known as the mirror formula.
  • It is given by
  • $\frac{1}{v}+\frac{1}{u}=\frac{1}{f}.........(10,4)$
  • where, $u =$ the distance of the object from the pole of the spherical mirror
  • $v =$ the distance of the image from the pole of the spherical mirror
  • $f =$ the distance of the principal focus from the pole of the spherical mirror.

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