A cube of side 15 cm is having an air bubble. The bubble appears at 6 cm from one face and at 4 cm from opposite face. The refractive index of cube is

5/2

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3/2

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2/3

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2/5

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Solution

The correct option is A 3/2
figure;
suppose, R. I. of cube is $μ$ .

then $A I = \frac{x_{1}}{μ} = 4 c m$

$B I^{1} = \frac{x_{2}}{μ} = 6 c m$

And $x_{1} + x_{2} = 15$

So $4 μ + 6 μ = 15$

$μ = \frac{15}{10}$

$= 1.5$

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A cube of side 15 cm is having an air bubble. The bubble appears at 6 cm from one face and at 4 cm from opposite face. The refractive index of cube is

The correct option is A 3/2figure;suppose, R. I. of cube is μ.then AI=x1μ=4 cmBI1=x2μ= 6 cmAnd x1+x2=15So 4μ+6μ=15μ=1510=1.5

The correct option is A 3/2
figure;
suppose, R. I. of cube is $μ$ .

then $A I = \frac{x_{1}}{μ} = 4 c m$

$B I^{1} = \frac{x_{2}}{μ} = 6 c m$

And $x_{1} + x_{2} = 15$

So $4 μ + 6 μ = 15$

$μ = \frac{15}{10}$

$= 1.5$