The electrons in a television tube are accelerated through a

The electrons in a television tube are accelerated through a potential of about 10,000 V. Evaluate the danger to those watching due to the brehmstrahlung radiation produced when these electrons strike the screen and produce the image.

Solution

Potential difference V = 10000 V

Mass of electron m = 9.1*10^-31 Kg

Velocity of the electron is,

       v = Sqrt(2eV/m)

          = Sqrt[(2*1.6*10^-19*10000)/(9.1*10^-31 Kg)]

      = 5.93x10^7 m/s

energy is calculated as follows:

    E = eV = 10000 eV

Hence, the wavelength is,

   Lambda = hc/E = 1240 eV.nm / 10000 eV = 0.124 nm

the range of wavelengths of X-rays is from 0.01 nm to 10 nm. So, the

waves are x-rays. these rays affect on the human and it causes to health problems for human.