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ICSE Class 10 Physics 2014 Paper

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A type of electromagnetic wave has wavelength 50Å50 Å.
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Question : 45 of 66
Marks: +1, -0
What is the speed of the wave in vacuum?
Solution:  
3×108m/s  ". "  3 \times 10^{8} \mathrm{m}/\mathrm{s} \; \text{". "} \;
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