Interference of light reflected from the two surfaces of a glass plate

1. A.
   $\left[\frac{\frac{1}{2} + \sqrt{\frac{3}{8}}}{\frac{1}{2} - \sqrt{\frac{3}{8}}}\right]^2$
2. B.
   $\left[\frac{\frac{1}{4} + \sqrt{\frac{3}{8}}}{\frac{1}{2} - \sqrt{\frac{3}{8}}}\right]^2$
3. C.
   $\frac{5}{8}$
4. D.
   $\frac{8}{5}$

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1. A.
   $7:1$
2. B.
   $49:1$
3. C.
   $4:1$
4. D.
   $8:1$

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1. A.
   $1 : 4$
2. B.
   $3 : 2$
3. C.
   $2 : 3$
4. D.
   $4 : 1$

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