This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
The major difference between X–Rays and Light is – 
Select and explain. 
A. Energy, B. Mass, C. Speed, D. Type of wave
A: Energy
Answer: A: Energy 
Explanation: The major difference between X-Rays and light is the 'energy' in each photon. An X-Ray photon has about 5000 times the energy than an ordinary light photon.
Major difference between X- rays & visible light:-


Wavelength
Energy