1. By using X-ray tube voltage of 90 kVp with filter, we can produce the Bremsstrahlung phenomenon with the average photon energy of 40 kev. What is the frequency of these average emitted photons of 40 kev? And what kind of electromagnetic wave are these photons? 2. What is the frequency of the emitted photon when electron of the Tungsten move from L to K shell? (The electron binding energy of the Tungsten is as shown below Occupancy Binding Energy & Shell (kev) 2P 0.02 120 0.05 32 N 0.50 18 M 2.5 S L. 10.2 - 69.5 3. If the linear attenuateon coefficient of bone for photon energy 40 kev is 0.8 cm-1, how much of the thickness of the bone is needed for decreasing half of the incident photon energy? 100 10 Bone Linear attenuateon coefficient (cm-1) Muscle 0 Far Soft tissue 0.1 10 15 20 30 40 50 60 70 80 100 150 200 Photon energy (ke V)