Answer / divya

An X-ray picture is really a picture of the shadows cast by the denser materials (like bones) in your body.These shadows are projected onto a film that has been coated with a sensitive material.
X-rays have a wavelength in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 120 eV to 120 keV

sir, pls mail me the previous question papers of RRB Junior Engineer Gr-II Drawing

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