A radioactive source emits X–rays of very short wavelength (10 -13m ) what is the frequently of these rays?

Answer Details

The frequency of the X-rays emitted by the radioactive source can be calculated using the formula:
frequency = speed of light / wavelength
The speed of light is approximately 3 x 10^8 m/s.
Substituting the given wavelength of 10^-13 m into the formula, we get:
frequency = 3 x 10^8 / (10^-13) = 3 x 10^21 Hz
Therefore, the frequency of the X-rays emitted by the radioactive source is 3 x 10^21 Hz.
Option C, which states 3 x 10^21 Hz, is the correct answer. Option A, B, and D are incorrect because they do not match the calculated frequency.