1

The diagram shows an activity carried out by a student.

Which of the following is not correct about the activity?

    • The student cannot see the lighted candle through the cardboard.
    • The candle light is blocked by the cardboard which is opaque.
    • If the cardboard is replaced by a clear plastic, the student can see the lighted candle clearly.
    • No shadow is formed when the light shines on the cardboard.