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प्रश्न
State two similarities and two dissimilarities between the γ-rays and X-rays.
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उत्तर
Similarities:
Both ?-radiations and X-rays affect photographic plate, both travel with the speed of light.
Dissimilarities:
?-radiations are obtained in emissions from the radioactive substances due to energy change in the nucleus of their atoms and X- rays are obtained when highly energetic cathode rays are stopped by a heavy metal target of high melting point.
?-radiations have high penetration power but X-rays do not have have very high penetration power.
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संबंधित प्रश्न
A radiation X is focused by a particular device on the bulb of a thermometer and mercury in the thermometer shows a rapid increase. Name the radiation X
Answer the following questions based on a hot cathode ray tube
Name the charged particles
Name a gas caused by the Greenhouse effect
State the penetrating range of α, β and γ radiations.
What kind of change takes place in a nucleus when a β -particle is emitted?
State two properties that a substance should possess when used as a thermionic emitter.
In a cathode ray tube state the purpose of the fluorescent screen.
The activity of a certain radionuclide decreases to 15 percent of its original value in 10 days. What is its half life?
[ln (0.15) = -1.9]
Assertion (A): Hydrogen atom consists of only one electron but its emission spectrum has may lines.
Reason (R): Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.
