Question

Cathode rays are similar to visible light rays, in that ___________.

• A. They both can be deflected by electric and magnetic fields
• B. They both have a definite magnitude of wavelength
• C. They both can ionise a gas through which they pass
• D. They both can expose a photographic plate

Answer 1

Answer: (C)

They both can ionise a gas through which they pass

Both the cathode rays and the visible light rays (because of having particle nature) affect the photographic plates when incident on it. So, cathode rays and visible light rays similar in that sense.