Question

A calcite crystal is placed over a dot on a piece of paper and rotated. On viewing through calcite, one will see

• A. a single dot.
• B. two stationary dots.
• C. two rotating dots.
• D. one dot rotating about the other.

Answer 1

The correct option is D one dot rotating about the other.

A dot which is shifted by some distance is appeared due to normal incidence and another dot is appeared which is rotating along with the crystal, when we see at a angle to the normal.
Hence option $D$ is correct .