2. Questions Bank
  3. 8th Class
  4. Science
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8th Class Science Light Question Bank Light Formative Subjective Problems

  • question_answer
    The radius of curvature of a concave mirror is 14.26 cm. Its focal length is_____ \[\times {{10}^{-2}}\]cm.

    Answer:

    We know that R = 2f or f = R/2 So, \[f=\frac{14.26}{2}=7.13\]cm \[=713\times {{10}^{2}}cm\]


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