A horizontal cylindrical tank 2.30 m in diameter is half full of water. The space above the water is filled with a pressurized gas of unknown refractive index. A small laser can move along the curved bottom of the water and aims a light beam toward the center of the water surface (the figure). You observe that when the laser has moved a distance S=1.11 m or more (measured along the curved surface) from the lowest point in the water, no light enters ther gas. What is the index of refraction of the gas? n= How long does it take the light beam to travel from the laser to the rim of the tank when S >1.11 m? t= ns How long does it take the light beam to travel from the laser to the rim of the tank when S < 1.11 m? t= ns I need help before midnight tonight Pacific time, as the assignment is due online. Please provide quote if answers can be provided on time. Thanks! Attachments: gas-figure.docx
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