
Cathode rays were discovered by
A.)Maxwell Clerk James
B.)Heinrich Hertz
C.)William Crookes
D.)J. J. Thomson
Answer
503.7k+ views
Hint: Cathode rays are the rays emitted from the cathode of the high-vacuum-tube. It was discovered. There are streams of the electrons in a discharge tube. In 1897, it was confirmed that the cathode rays are composed of the negatively charged particle known as electrons.
Complete answer:
About the discovery of the cathode rays, actually it was two German physicists named Julius Plücker and Johann Wilhelm who firstly observed these rays in 1869. But they were named by someone else named Eugen Goldstein in 1876.
And after all this happened, a British physicist named J.J. Thomson (in 1897) came to the conclusion that these cathode rays are composed of some unknown negatively charged part vile which were later known as electrons.
Here in the given question any of the options is not showing the mention of any of the above scientists other than the J.J. Thomson. So, regarding this situation the correct answer is J.J. Thomson.
So, the correct answer is “Option D”.
Note:
Process of generation of the cathode tube-
To understand the formation of the cathode rays we will take an activity example as follows-
If we take an evacuated glass tube and we put two electrodes (named cathode and anode). Now we apply some voltage across the electrodes. Then we will see that there is glow at the opposite side of the negative electrode. This glow is due to the emission of the electrons from the cathode. Hence, we see that the discovery of the electrons was done as a constituent of the cathode rays. One of the examples of the application of the cathode ray is the image formation in the televisions by the use of cathode ray tubes.
Complete answer:
About the discovery of the cathode rays, actually it was two German physicists named Julius Plücker and Johann Wilhelm who firstly observed these rays in 1869. But they were named by someone else named Eugen Goldstein in 1876.
And after all this happened, a British physicist named J.J. Thomson (in 1897) came to the conclusion that these cathode rays are composed of some unknown negatively charged part vile which were later known as electrons.
Here in the given question any of the options is not showing the mention of any of the above scientists other than the J.J. Thomson. So, regarding this situation the correct answer is J.J. Thomson.
So, the correct answer is “Option D”.
Note:
Process of generation of the cathode tube-
To understand the formation of the cathode rays we will take an activity example as follows-
If we take an evacuated glass tube and we put two electrodes (named cathode and anode). Now we apply some voltage across the electrodes. Then we will see that there is glow at the opposite side of the negative electrode. This glow is due to the emission of the electrons from the cathode. Hence, we see that the discovery of the electrons was done as a constituent of the cathode rays. One of the examples of the application of the cathode ray is the image formation in the televisions by the use of cathode ray tubes.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are

Master Class 12 Economics: Engaging Questions & Answers for Success

Master Class 12 Maths: Engaging Questions & Answers for Success

Master Class 12 Biology: Engaging Questions & Answers for Success

Master Class 12 Physics: Engaging Questions & Answers for Success

Master Class 4 Maths: Engaging Questions & Answers for Success

Trending doubts
Give 10 examples of unisexual and bisexual flowers

Draw a labelled sketch of the human eye class 12 physics CBSE

a Tabulate the differences in the characteristics of class 12 chemistry CBSE

Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE

Why is the cell called the structural and functional class 12 biology CBSE

Differentiate between insitu conservation and exsitu class 12 biology CBSE
