The wavelength $21 \ cm$ emitted by atomic hydrogen in interstellar space belongs to
- ARadio waves
- BInfrared waves
- CMicrowaves
- D$\gamma$-rays
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Similar Questions
. . . . . . are used in medicine to destroy cancer cells.
Choose the correct option relating the wavelengths of different parts of the electromagnetic wave spectrum.
$A$ charged particle oscillates about its mean equilibrium position with a frequency of $10^9 \ Hz$. The electromagnetic waves produced:
Easy
View SolutionWhich of the following has the minimum wavelength?
Easy
View SolutionMatch the List-$I$ with List-$II$:
List-$I$ List-$II$ $A$. Microwaves $I$. Radioactive decay of the nucleus $B$. Gamma rays $II$. Rapid acceleration and deceleration of electrons in aerials $C$. Radio waves $III$. Inner shell electrons $D$. $X$-rays $IV$. Klystron valve
Choose the correct answer from the options given below:
| List-$I$ | List-$II$ |
|---|---|
| $A$. Microwaves | $I$. Radioactive decay of the nucleus |
| $B$. Gamma rays | $II$. Rapid acceleration and deceleration of electrons in aerials |
| $C$. Radio waves | $III$. Inner shell electrons |
| $D$. $X$-rays | $IV$. Klystron valve |
Choose the correct answer from the options given below:
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