Delermine lhe wavelength of pholon emitted which has an energy at'a.5 ev.
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at'2.5 eV.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5ce5f973-7dd5-4734-8f9d-2589bdced1ff%2Feef9243e-a3ba-4655-bcfb-050f1a2402a2%2Fiidjlg_processed.jpeg&w=3840&q=75)
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