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UPSC Prelims 1979Question 46Science & Technology

When light enters a closed room through a small hole in the door, the image of an outside building appears as inverted on the opposite wall. This is because

Options

  1. (a)The hole acts as a convex lens
  2. (b)Light takes curvature at the edges of the hole
  3. (c)Of rectilinear propagation of light
  4. (d)The hole acts as a concave lens

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