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| Q. |
Which of the following colour of light deviates least through the prism? |
| A. | yellow |
| B. | green |
| C. | violet |
| D. | red |
| Answer» D. red | |
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Explanation: In refracting media like glass prism, water, etc., lights of different colors travel with different speeds. The speed of violet colour is the least, while the speed of red colour is the largest in prism. As a result, the refractive index of glass is largest for violet colour and least for red colour. So the violet colour is deviated the most, while red colour is deviated least on passing through the prism. |
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