Position of a bright fringe of given order for two wavelengths

1. A.
   $\frac{3\lambda_1}{\lambda_2}$
2. B.
   $\frac{3\lambda_2}{\lambda_1}$
3. C.
   $\frac{\lambda_1}{3\lambda_2}$
4. D.
   $\frac{\lambda_2}{3\lambda_1}$

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1. A.
   $\frac{\lambda_1}{\lambda_2}$
2. B.
   $\frac{\lambda_2}{\lambda_1}$
3. C.
   $\frac{\lambda_1^2}{\lambda_2^2}$
4. D.
   $\frac{\lambda_2^2}{\lambda_1^2}$

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1. A.
   $\dfrac{3\lambda_1}{4\lambda_2}$
2. B.
   $\dfrac{3\lambda_2}{4\lambda_1}$
3. C.
   $\dfrac{4\lambda_1}{3\lambda_2}$
4. D.
   $\dfrac{4\lambda_2}{3\lambda_1}$

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1. A.
   $14.25\text{ }mm,16.55\text{ }mm$
2. B.
   $12.25\text{ }mm,14.55\text{ }mm$
3. C.
   $10.25\text{ }mm,12.55\text{ }mm$
4. D.
   $16.25\text{ }mm,18.55\text{ }mm$

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1. A.
   $\left( 0.75 \times 10^{+ 3} \right)\lambda_{1}$
2. B.
   $\left( 1.75 \times 10^{+ 3} \right)\lambda_{1}$
3. C.
   $\left( 2.00 \times 10^{+ 3} \right)\lambda_{1}$
4. D.
   $\left( 2.25 \times 10^{+ 3} \right)\lambda_{1}$

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1. A.
   $2 \times 10^{-4}$ m
2. B.
   $1 \times 10^{-4}$ m
3. C.
   $8 \times 10^{-4}$ m
4. D.
   $4 \times 10^{-4}$ m

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1. A.
   $6500$
2. B.
   $6300$
3. C.
   $5400$
4. D.
   $4800$

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