No. of waves of a certain colour light are 2000 in 1 mm distance in air, then what will be wavelength of light in medium of refractive Index 1.25 ?

No. of waves of a certain colour light are 2000 in 1 mm distance in ai

1.	No. of waves of a certain colour light are 2000 in 1 mm distance in air, then what will be wavelength of light in medium of refractive Index 1.25 ?
Answer» 1000 Å 2000 Å 3000 Å 4000 Å Solution :`lambda_("air")=(1mm)/(2000)=5XX10^(-4)mm=5000 Å` `:.lambda_("MEDIUM")=(lambda_("air"))/(MU)=(5000Å)/(1.25)=4000Å`

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No. of waves of a certain colour light are 2000 in 1 mm distance in air, then what will be wavelength of light in medium of refractive Index 1.25 ?

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