How Many Photons Are Contained in a Flash of Green

question 31

Multiple Choice

How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy?

• A) 5.67 × 10²³ photons
• B) 2.01 × 10²⁴ photons
• C) 1.25 × 10³¹ photons
• D) 4.99 × 10²³ photons
• E) 7.99 × 10³⁰ photons

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