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CE BIO Persistence of Vision Although an incandescent
Chapter 24, Problem 72GP(choose chapter or problem)
Problem 72GP
CE BIO Persistence of Vision Although an incandescent lightbulb appears to shine with constant intensity, this is an artifact of the eye’s persistence of vision. In fact, the intensity of a bulb’s light rises and falls with time due to the alternating current used in household circuits. If you could perceive these oscillations, would you see the light attain maximum brightness 60 or 120 times per second? Explain.
Questions & Answers
QUESTION:
Problem 72GP
CE BIO Persistence of Vision Although an incandescent lightbulb appears to shine with constant intensity, this is an artifact of the eye’s persistence of vision. In fact, the intensity of a bulb’s light rises and falls with time due to the alternating current used in household circuits. If you could perceive these oscillations, would you see the light attain maximum brightness 60 or 120 times per second? Explain.
ANSWER:
Step 1 of 3
A light bulb will shine no matter what the direction of the current flowing through. Thus, if we have an alternating current, the light will attain its maximum intensity two times per cycle.