Advertisements
Advertisements
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.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Name a gas caused by the Greenhouse effect
Name the unit in which the work function of a metal is expressed.
What are isobars?
Radioactive substances were found to give off three types of rays. Name them. How do they
(a) React to the magnetic field?
(b) React to the electric field?
(c) Act when different thickness of lead sheets is placed in their path?
What is nucleus of an atom? Compare its size with that of the atom. Name its constitutents. How is the number of these constituents determined by the atomic number its atomic model.
Name two radioactive substances.
Why should a radioactive substance not be touched by hands?
How is a cathode ray tube used to convert an electrical signal into a visual signal?
Name the Different Radiations Which Are Emitted by the Radioactive Substances.
Are all the radiations mentioned by you, emitted in a single radioactive decay?
State three common properties of beta rays and cathode rays.
What is the value of the speed of gamma radiations in air or vacuum?
The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be ______.
Complete the following radioactive reaction:
\[\ce{^-_-X -> ^-_-Y + ^4_2He -> ^234_91Z + ^0_-1e}\]
In the following atoms, which one is a radioisotope? Give one use of this isotope.
O16, C14, N14, He4
