A certain X-ray machine generates X-rays from a beam of electrons accelerated from zero to 99.9999999 per cent the speed of light in a long linear accelerator of length 3.2 km. The electrons are generated in pulses of duration ∆t = 100 fs. The generated x-rays from the target are also short pulses (λ = 0.15 nm). Determine the length of one pulse of electrons. (1 fs = 1 femtosecond = 10-15 s.) A) .01 mm B) .03 mm C) .03 cm D) none of these.

A certain X-ray machine generates X-rays from a beam of electrons accelerated from zero to 99.9999999 per cent the speed of light in a long linear accelerator of length 3.2 km. The electrons are generated in pulses of duration ∆t = 100 fs. The generated x-rays from the target are also short pulses (λ = 0.15 nm). Determine the length of one pulse of electrons. (1 fs = 1 femtosecond = 10-15 s.) A) .01 mm B) .03 mm C) .03 cm D) none of these.

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