Question

A dental X‑ray typically affects 185 g of tissue and delivers about 4.15 μJ of energy using X‑rays that have wavelengths of 0.0235 nm. What is the energy in electron volts of a single photon of these X‑rays? energy of a photon: eV

How many photons are absorbed during the dental X‑ray?

number of photons absorbed:

Answer 1

The expression for the energy of a photon is as follows: hc E= The wavelength of the x-rays is 0.0235 nm. Calculate the energy of a photon is as follows: E- hc -(6.626x10-34)(3x10s m/s) 0.0235 nm (6626x10-MJ)(16110 万)(3x10, m/s) leV 3 x10 m/s 1.6x10-19.J 0.0235x10 9 m 52867.02eV The energy of 185 g of photons is 4.15 uJ

Then calculate the number of photons as follows: EoalnE total total 4.15uJ 52867.02 eV 4.15x10-6 J 52867.02 eV | 1.6x10-19 J leV = 4.9 × 108 photons