A small piece of glass found at a crime scene is placed in a beaker full of oil & the oil is gently warmed. At one temperature the glass piece seems to disappear. Why?

Because the glass dissolves in oil

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Because the refractive index of oil becomes equal to that of Glass at a certain temperature

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Because the light undergoes TIR

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Because Light will always be incident along the normal at certain temperatures

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Because Light undergoes critical phenomenon

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Solution

The correct option is B
Because the refractive index of oil becomes equal to that of Glass at a certain temperature

(Rl)_oilat that temperature = (RI)_glass

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A small piece of glass found at a crime scene is placed in a beaker full of oil & the oil is gently warmed. At one temperature the glass piece seems to disappear. Why?

The correct option is B Because the refractive index of oil becomes equal to that of Glass at a certain temperature(Rl)oil at that temperature = (RI)glass

The correct option is B
Because the refractive index of oil becomes equal to that of Glass at a certain temperature

(Rl)_oilat that temperature = (RI)_glass