Question

Which one of the following is not a reason for not using X-rays in communication?

(a) Highly attenuated

(b) High power is required

(c) Stopped by ionizing effects

(d) Ionizing radiation

I have been asked this question in an interview for internship.

Question is taken from Electromagnetic Spectrum topic in division Introduction to Electronic Communication of Avionics

Answer 1

The correct answer is (c) Stopped by ionizing effects

Explanation: X-rays are not stopped by ionizing effects and that was the only reason they were ever thought they could be used in communication. In re-entry vehicles, a temporary communication cut off is experienced due to ionizing effects. X- rays were hard to modulate and focus and hence gradually let down.