A Sodium Vapor Lamp Has a Power Output of 300

question 52

Multiple Choice

A sodium vapor lamp has a power output of 300 W.If 590 nm is the average wavelength of the source,about how many photons are emitted per second? (h = 6.63 x 10^-34 J*s,c = 3.00 x 10⁸ m/s,and 1 nm = 10^-9 m)

• A)10¹⁷
• B)10²¹
• C)10²⁵
• D)10²⁹

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