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प्रश्न
Give a scientific explanation.
When the radiation coming out from a certain radioactive substance is passed through an electric field, marks are found at three places on the photographic plate placed in its path.
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उत्तर
When the radiation coming out from a certain radioactive substance is passed through an electric field, marks are found at three places on the photographic plate placed in its path. These three marks represent the three kinds of rays which are emitted by the radioactive substances. One type of radiation deviated slightly towards the negatively charged plate and was called alpha rays. The second type of radiation deviated substantially towards the positively charged plate and was called the beta rays. The third type of radiation did not deviate at all and was called the gamma rays.
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संबंधित प्रश्न
Answer the following questions based on a hot cathode ray tube
Name the charged particles
Answer the following questions based on a hot cathode ray tube.
What will happen to the beam when it passes through the electric field?
State the energy conversion taking place in a cathode ray tube
State any two precautions to be taken while handling radioactive substances.
A nucleus `""_11^24Na` emits a beta particle to change into Magnesium (Mg)
(i) Write the symbolic equation for the process.
(ii) What are numbers 24 and 11 called?
(iii) What is the general name of `""_12^24Mg `with respect to `""_11^24Na` ?
What do you mean by Atomic number
State two dissimilarities between the γ-rays and X-rays.
In following fig. shows a mixed source S of alpha and beta particles in a thick lead container. The particles pass through a magnetic field in a direction perpendicular to the plane of paper (inwards as shown by x). State and show in the diagram how the particles get affected.
Define the term radioactivity.
Name two radioactive substances.
What happens to the position of an element in the periodic table when it emits an alpha particle
During the emission of a beta particle, the ______ number remains same.
Define free electrons.
What do you mean by electron emission?
State two properties that a substance should possess when used as a thermionic emitter.
How is a cathode ray beam affected while passing through an electric field?
What are cathode rays? Why are they called ‘cathode rays’? Name a material which exhibits fluorescence when cathode rays fall on it.
In a cathode ray tube state. How is it possible to increase the rate of emission of electrons.
Name the three main parts of a Cathode Ray Tube.
The mean lives of a radioactive substance are 1620 and 405 years for β-emission and β-emission respectively. The time after which three fourth of a sample will decay if it is decaying both by β-emission and β-emission simultaneously will be ______ years.
(Take ln 2 = 0.693)
