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Question
When a compact disc is illuminated by a source of white light, coloured lines are observed. This is due to :
When a compact disc is illuminated by a source of white light, coloured lines are observed. This is due to :
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Solution
The correct option is B diffraction
A compact disc contains many fine circular lines on it so it acts as diffraction grating. When white light falls upon it, it is diffracted as a result of which different colours are diffracted at different angles. We see different colours when we look at it through different angles.
A compact disc contains many fine circular lines on it so it acts as diffraction grating. When white light falls upon it, it is diffracted as a result of which different colours are diffracted at different angles. We see different colours when we look at it through different angles.
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