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- They are produced by the negative electrode, or cathode, in an evacuated tube, and travel towards the anode. 
- They travel in straight lines and cast sharp shadows. 
- They have energy and can do work. 
- They are deflected by electric and magnetic fields and have a negative charge. 
- They are beams of tiny, negatively charged particles called electrons.
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Cathode rays are streams of electrons observed in vacuum tubes.
> they travel in straight lines.
> cathode rays consists of negatively charged particles.

Cathode rays can penetrate through thin metallic sheets.
>they produce heating effect..
 Cathode rays travel with speed nearly equal to that of light.
hope it helped. :)
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