Multiple choice

An optically plane surface reflects a beam of light

  1. As a parallel beam in one direction

  2. As diffused beam in all directions

  3. As parallel beam in all directions

  4. As a diffused beam in one direction
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An optically plane surface reflects a beam of light as a parallel beam in one direction (regular reflection). This is because all rays strike at the same angle of incidence and reflect at the same angle of reflection, maintaining parallelism. A diffused beam occurs with rough surfaces where light scatters in different directions.

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