system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Light rays and X-rays have same
assistant
The correct answer is  Ans: a (Velocity) Ref: Practical Radiotherapy- physics and equipment 2nd cd/p.9Electromagnetic waves all travel in vaccum with a velocity equal to the velocity of light 3xl08m/s.