I observed that as I lower the piece of paper behind the glass of water, the direction of the arrow got inverted.
2. What happened to the arrow?
The arrow behind the glass was inverted and pointed unto the other direction.
3. Explain why it happened
As we know, light travels differently through different mediums, so as the light went through the glass and water, the light bends, known as refraction, thus flipping the arrow in the opposite direction.
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Answer:
1. What did you observe?
2. What happened to the arrow?
3. Explain why it happened