A 60-W Bulb Is Operating at an Efficiency of 6

question 87

Multiple Choice

A 60-W bulb is operating at an efficiency of 6.20%. What is the number of photons per second given off by the bulb assuming the wavelength of light to be 580 nm?

• A) 5.42 × 10¹⁸ photons/s
• B) 10.8 × 10¹⁸ photons/s
• C) 16.2 × 10¹⁸ photons/s
• D) 21.7 × 10¹⁸ photons/s
• E) 25.3 × 10¹⁸ photons/s

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