Physical World
Radioactive substances emit $$\gamma$$ -rays which are:
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Single Choice
The velocity of $$\alpha$$ -rays is approximately:
AEqual to that of the velocity of light
B1/10 of the velocity of light
Correct Answer
C10 times more than the velocity of light
DUncomparable to the velocity of light
Solution
Velocity of $$\alpha$$ rays is $$2\times 10^7 ms^{-1}$$ and velocity of light is $$3\times 10^8 ms^{-1}$$. So, the velocity of α -rays is approximately
$$\frac{1}{10}th$$ of the velocity of light.
Hence, option $$B$$ is correct.
SIMILAR QUESTIONS
Physical World
Which statement is incorrect?
Physical World
Alpha rays consist of a stream of:
Physical World
Which is the correct statement?
Physical World
$$\alpha$$ -rays have:
Physical World
Of the following radiations, the one most easily stopped by air is:
Physical World
Which has the least penetrating power?
Physical World
The charge exists on $$\gamma$$ -rays:
Physical World
Which of the following can be used to convert $$_7^{14}N$$ and $$_8^{17}O$$?
Physical World
The charge on gamma rays is:
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