The positively charged particles in the modified cathode ray tube are also known as ________.

The Correct Answer is Canal rays.

Key Points

• Canal rays:
  • The positively charged particles in the modified cathode ray tube are also known as Canal rays.
  • An anode is a positively charged electrode while a cathode is a negatively charged electrode.
  • Canal rays are new types of rays produced from the anode moving towards the cathode and passing through the holes of the cathode.
  • Modified cathodes are called corona particles in the canal ray tube.
  • These rays are positively charged and are called positive rays or canal rays or anode rays.
  • These rays were discovered by Goldstein.

Additional Information

• Neutrons:
  • Neutrons along with protons are found in the nucleus of an atom.
  • Neutrons have zero charges which mean they are neutral particles.
• X-rays (0.01 to 10 nm):
  • X-rays have much higher energy and much shorter wavelengths than ultraviolet light that can pass through solid objects, including the body.
  • Wilhelm Conrad Roentgen discovered the X-rays.
• Ultraviolet rays:
  • Ultraviolet (UV) light falls in the range of the EM spectrum between visible light and X-rays.
  • UV radiation is classified into three types based on its wavelength.
    • They are ultraviolet A (UVA) (315–400 nm), ultraviolet B (UVB) (280–315 nm), and ultraviolet C (UVC) (180–280 nm). 
  • The shorter the wavelength, the more harmful the UV radiation.