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Grade 11,

in this ques 1 wavelenght is given and another one ask.. but without using the value of wavelenght i find 2*10^-7.. but the actuall answer is 1*10^-8..

in this ques 1 wavelenght is given and another one ask.. but without using the value of wavelenght i find 2*10^-7.. but the actuall answer is 1*10^-8..

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Grade:12th pass

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