If the energy reaching your eyeball at 10 meters from a small light bulb is expressed as x, express the energy which would reach your eyeball at 20 meters?

If the energy reaching your eyeball at 10 meters from a small light bulb is expressed as x, express the energy which would reach your eyeball at 20 meters?
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ANSWER: (1/4)x
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Description : A far-sighted person, without optical correction, is typically able to see nearby objects more clearly in bright light. The reason for this phenomena is: w) bright light provides better ... bright light causes squinting which flattens the eyeball which tends to correct the far-sighted condition.

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As a 10 kilogram mass on the end of a spring passes through its equilibrium position, the kinetic energy of the mass is 20 joules. The speed of the mass is: w) 2.0 meters per second x) 4.0 meters per second y) 5.0 meters per second z) 6.3 meters per second

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