Which part of the electromagnetic spectrum contains photons of energy about 15 keV?
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Which part of the electromagnetic spectrum contains photons of energy about 15 keV?

G1 Physics · Accepted Answer

Step 1: Photon energy E = hf = hc/λ; an energy 15 keV is much higher than visible/infrared photons. Step 2: X-ray photons commonly have energies in the keV range (while UV photons are usually eV). Step 3: Hence 15 keV belongs to X-rays. Answer A. Final answer: (A) X-rays.