How Much Energy Does a Single Photon of an Argon

question 23

Multiple Choice

How much energy does a single photon of an argon ion laser emit if the wavelength of this photon is 489 nm?

• A) 4.06×10 ^{- 19} J
• B) 9.74×10 ^{- 23} J
• C) 4.06×10 ^{- 28} J
• D) 9.74×10 ^{- 32} J
• E) None of these

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