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Q1
Light is usually described as a wave. Light can also be described as a stream of particles.
These are two different scientific models of light.
(c) Sometimes an old scientific model is replaced by a new model.
Explain why scientists replace an old scientific model with a new model.
Include an example from Physics in your answer.
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(4)
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New experimental evidence is found that doesn’t fit the old model. This shows the old model is incorrect. A new model is made that explains the new evidence or makes correct predictions.
For example, the nuclear model of the atom replaced the plum pudding model.
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