Question

Who discovered cathode rays ?
(a) J.J. Thomson
(b) Rutherford
(c) Plank
(d) Chadwik​

Answer 1

Answer:

(a) is the correct answer

Explanation:

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Answer 2

(a) J.J. Thomson discovered cathode rays.

About Sir J.J. Thomson:

• The electron was the first subatomic particle to be found, and Sir Joseph John Thomson, a British physicist, and recipient of the Nobel Prize in Physics is credited with its discovery.
• British scientist J.J. Thomson made the discovery that atoms were composed of smaller parts on April 30, 1897.
• The cathode ray tube studies of J.J. Thomson demonstrated that all atoms contain minute, electron-like subatomic particles that are negatively charged.
• Thomson proposed the plum pudding model of the atom, which contained positively charged "soup" and negatively charged electrons inside.

What are cathode rays?

• Electron streams known as cathode rays are seen in discharge tubes.
• When a voltage is supplied to an evacuated glass tube with two electrodes, it can be seen that the glass behind the positive electrode glows as a result of the cathode's emission of electrons.
• The particles that make up the cathode ray are negatively charged.
• Since the mass of each particle is just 20001 start fraction, 1, divided by 2000, end fraction the mass of an atom of hydrogen, they must be a component of the atom.
• Atoms of all elements include these subatomic particles.

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