Which one of the following is incorrect statement? (a)...

Which one of the following is incorrect statement?
(a) Cathode rays are emitted out from the surface of cathode
(b) Cathode ray travel in straight line
(c) Cathode rays have constant $\mathrm{elm}$ ratio
(d) Cathode rays are electromagnetic radiations

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Key Concepts

Cathode Rays

Cathode rays are streams of electrons observed in vacuum tubes when high voltage is applied across electrodes. Their study was crucial in the discovery of the electron and in establishing the particle nature of matter at the sub-atomic level.

Electromagnetic Radiation

Electromagnetic radiation refers to waves of oscillating electric and magnetic fields that propagate through space. Unlike cathode rays, which consist of charged particles, electromagnetic radiation does not involve the movement of matter but rather energy transmission.

Charge-to-Mass Ratio

The charge-to-mass ratio is a characteristic constant of particles like electrons, determined through experiments with cathode rays. It helps in confirming the identity of charged particles by comparing their acceleration in electromagnetic fields.

Straight-line Propagation

Straight-line propagation is a key experimental observation where particles, such as those in cathode rays, travel in undeflected paths unless subjected to external forces. This property was fundamental in demonstrating their particle-like behavior and in mapping their trajectories.

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