Consider the 2 x-ray spectra from the same x-ray machine. Measured photon spectra from an x-ray tube with tungsten anode operated at a constant 140 kV potential. It has an inherent filter thickness of 2.50-mm aluminium and an additional filter of 6-mm aluminium (thin line) with HVL quality of 8.35-mm Al. Explain why the spectra are shifted in energy

Q: just part two only

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Unijunction Transistor (UJT)

The Unijunction Transistor (UJT) is a three-terminal switching semiconductor device. It contains an n-shaped silicone object bar with a terminal attached to its two ends known as base one and base two. The third terminal is connected to a highly enclosed p-type material attached to the bar section of its length and is known as emitter. As there is only one corrective cross within the device, it is therefore called the 'Unijunction' transistor. The characteristics of the single junction transistor show the wrong resistance if it finds use in resting oscillator circuits for various applications.