Invisible Glass | English

Place a small beaker in a big one and pour oil. On topping the big beaker with oil the small beaker will become invisible. Why? For doing this experiment you need a bottle of cooking oil, a mug of water and two good quality Pyrex beakers – small and big. First place the small beaker inside the big one. Fill the small beaker with water. The small beaker will be visible. Even on topping the big beaker with water you will be able to see the small beaker. Then repeat the same experiment with cooking oil. Place

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