An Atom in Its Ground State Absorbs a Single Photon

question 57

Multiple Choice

An atom in its ground state absorbs a single photon of light and then relaxes back to the ground state by emitting an infrared photon (1,200 nm) followed by an orange photon (600 nm) . What is the wavelength of the photon that was absorbed initially?

• A) 600 nm
• B) 1,200 nm
• C) 1,800 nm
• D) 900 nm
• E) 400 nm

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