How are infrared waves produced?
- ABy the vibration of atoms and molecules.
- BBy the oscillation of electrons in an antenna.
- CBy the transition of electrons in inner atomic shells.
- DBy the decay of radioactive nuclei.
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In household appliances,which waves are used to operate remote control switches?
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View SolutionWhat is the range of the radio frequency band for $FM$ (Frequency Modulated) broadcasting?
List-$I$ List-$II$ $A$. $UV$ rays $(i)$ Diagnostic tool in medicine $B$. $X-$rays $(ii)$ Water purification $C$. Microwave $(iii)$ Communication,Radar $D$. Infrared wave $(iv)$ Improving visibility in foggy days
Choose the correct answer from the options given below.
| List-$I$ | List-$II$ |
| $A$. $UV$ rays | $(i)$ Diagnostic tool in medicine |
| $B$. $X-$rays | $(ii)$ Water purification |
| $C$. Microwave | $(iii)$ Communication,Radar |
| $D$. Infrared wave | $(iv)$ Improving visibility in foggy days |
Frequencies of various radiations are given as:
$v_v \rightarrow$ Visible light
$v_r \rightarrow$ Radio Wave
$v_{uv} \rightarrow$ Ultraviolet Waves
Then which of the following is true?
$v_v \rightarrow$ Visible light
$v_r \rightarrow$ Radio Wave
$v_{uv} \rightarrow$ Ultraviolet Waves
Then which of the following is true?
Arrange the following in the ascending order of wavelength $(\lambda) :$
$(A)$ Microwaves $(\lambda_1)$
$(B)$ Ultraviolet rays $(\lambda_2)$
$(C)$ Infrared rays $(\lambda_3)$
$(D)$ $X-$rays $(\lambda_4)$
Choose the most appropriate answer from the options given below $:-$
$(A)$ Microwaves $(\lambda_1)$
$(B)$ Ultraviolet rays $(\lambda_2)$
$(C)$ Infrared rays $(\lambda_3)$
$(D)$ $X-$rays $(\lambda_4)$
Choose the most appropriate answer from the options given below $:-$
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