NCERT Solutions for Class 9 Science Chapter 4
Structure of the Atom
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-47
Questions No-1
What are canal rays?
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Understanding Canal Rays:
– Discovery: Canal rays, also called positive rays or anode rays, were discovered by Eugen Goldstein during experiments with cathode rays in the late 19th century.
– Nature: They are positively charged ions or cations that move in discharge tubes, opposite to the direction of cathode rays, under the influence of an electric field.
– Composition: Comprised of positively charged particles, the nature of these rays varies depending on the gas present in the discharge tube.
– Movement: Canal rays move towards the cathode (negative electrode) within the tube due to the applied electric field.
– Characteristics: They exhibit deflection when subjected to magnetic or electric fields, indicating their charged nature.
Significance of Canal Rays:
– Scientific Insights: These rays contributed significantly to the understanding of atomic structure and the discovery of isotopes.
– Charged Particle Study: Studying canal rays led to the realization of positively charged particles beyond electrons, furthering the understanding of atomic constituents.
Conclusion:
Canal rays, or positive rays, discovered by Eugen Goldstein, are positively charged ions observed moving within discharge tubes. Their study played a crucial role in advancing the understanding of atomic structure and charged particles, contributing significantly to the field of atomic and particle physics.
Canal rays are positively charged radiations. These rays consist of positively charged particles
known as protons. They were discovered by Gold stein in 1886.
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