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Physics, 17.04.2020 04:32 supercutedonuf3753
PtsA flashlight is pointed at the ground, forming a spot of light. The radius of the spot of light is measured and the area of the spot is calculated. The brightness of the spot is measured. Then the flashlight is moved so it is twice as far from the floor. The new brightness will be times the old brightness.
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PtsA flashlight is pointed at the ground, forming a spot of light. The radius of the spot of light i...
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