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Answer Questions 9 and 10 based on the following diagram.

Asom is carrying out a test by arranging three cardboards with holes as shown above. If Asom can see the lighted candle, this shows that

    • the light only moves in one direction
    • the light travels in a straight line
    • the light is strong enough to reach Asom’s eyes
    • the light is reflected from the cardboards and enters Asom’s eyes