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Question
State the correct sequence (1-7) of colours in the spectrum of white light formed by the prisms A and B. [3 marks]
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Solution
- A prism splits white light into seven colours i.e. violet, indigo, blue, green, yellow, orange and red. A spectrum is obtained undergoing maximum deviation with violet colour and minimum deviation with red colour. [1 mark]
- When the prism is inverted, a spectrum is obtained with red colour undergoing maximum deviation and violet colour undergoing minimum deviation. [1 mark]
[1 mark]
- A prism splits white light into seven colours i.e. violet, indigo, blue, green, yellow, orange and red. A spectrum is obtained undergoing maximum deviation with violet colour and minimum deviation with red colour. [1 mark]
- When the prism is inverted, a spectrum is obtained with red colour undergoing maximum deviation and violet colour undergoing minimum deviation. [1 mark]
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