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Light — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceLight2 Marks
Question
Define the following:
  1. Opaque Spherical Surface.
  2. Transparent Spherical Surface.
✓

Answer

  1. In an opaque spherical surface, the silvered surface acts as a mirror. So, a concave mirror will have its concave side silvered, while a convex mirror will have its convex side silvered.
  2. For a transparent spherical surface, if the concave surface is silvered and later coated with red oxide, then the mirror acts as a convex mirror. Also, if the convex surface is silvered and later coated with red oxide, then it acts as a concave mirror.

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