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of students measure the intensity of light from a desklamp in Sec. 4.5 of the experiment. When the detector is 25 cm from the lamp, the signal measured by the detector is 0.74 V. How large a signal (in V) do the students expect when the detector is 53 cm away?

of students measure the intensity of light from a desklamp in Sec. 4.5 of the experiment. When the detector is 25 cm from the lamp, the signal measured by the detector is 0.74 V. How large a signal (in V) do the students expect when the detector is 53 cm away?

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A pair of students measure the intensity of light from a desklamp in Sec. 4.5 of the experiment. When the detector is 25 cm from the lamp, the signal measured by the detector is 0.74 V. How large a signal (in V) do the students expect when the detector is 53 cm away?

Expert Solution
Step 1

Given: The distance of detector from lamp is 25 cm. 

           The voltage is 0.74 V. 

To determine: The value of the signal when detector is 53 cm away. 

Let the strength of the signal be s. 

V1=s25 cm×25 cm0.74 V=s25 cm×25 cms=462.5 V.cm2

 

 

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