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प्रश्न
Which of the following statements is/are correct?
- α particles are photons
- Penetrating power of γ radiation is very low
- Ionization power is maximum for α rays
- Penetrating power of γ radiation is very high
विकल्प
(i) & (ii) are correct
(ii) & (iii) are correct
(iv) only correct
(iii) & (iv) are correct
उत्तर
(iii) & (iv) are correct.
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संबंधित प्रश्न
What are free electrons?
Complete the diagram as given above by drawing the deflection of radioactive radiations in an electric field
In a cathode ray tube state:
(i) the purpose of covering cathode by thorium and carbon.
(ii) the purpose of the fluorescent screen.
(iii) how is it possible to increase the rate of emission of electrons.
Radiations given out from a source when subjected to an electric field in a direction perpendicular to their path are shown below in the diagram. The arrows show the path of the radiation A, B and C. Answer the following questions in terms of A, B and C.
1) Name the radiation B which is unaffected by the electrostatic field.
2) Why does the radiation C deflect more than A?
3) Which among the three causes the least biological damage externally.
4) Name the radiation which is used in carbon dating.
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.
A radioactive substance is oxidized. What changes would you expect to take place in the nature of radioactivity? Explain your answer.
How is a cathode ray tube used to convert an electrical signal into a visual signal?
What is the value of the speed of gamma radiations in air or vacuum?
State three ways of obtaining an electron-beam.
