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Q. |
A small drop of oil spreads over water because : |
A. | oil has a higher surface tension |
B. | water has a higher surface tension |
C. | oil has a higher viscosity |
D. | water has a higher viscosity |
Answer» B. water has a higher surface tension | |
Explanation: Dispersion is used to separate a beam of white light into its constituent spectrum of colours. This phenomenon leads to rainbow. |
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