@z_hu5ain: Disappearing act using a beaker and oil. The "oil and beaker" practical is a classic physics and chemistry demonstration that teaches refractive index. By filling a small beaker inside a larger beaker with vegetable oil, the small beaker magically "disappears" because light travels through both glass and oil at the exact same speed and angle. #teacher #Science #physics #refraction #experiment

Mr Hussain

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Wednesday 03 June 2026 16:06:29 GMT