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4. The wavelength of light in air is 5000 A.U. The numberof waves in 50 cm of air is |
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Answer» Answer: Speed of light in AIR is 3*10^8 m/s W = WAVELENGTH N =REFRACTIVE index of the medium =1.5 W in air =5000 A =5*10^-7 Metres FREQUENCY in air is 5*10^14 hz So answer is 3000 A |
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