Assertion : Microwaves are better carrier of signals than optical waves.
Reason : Microwaves move faster than optical waves.
Reason : Microwaves move faster than optical waves.
- AIf both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
- BIf both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
- CIf the Assertion is correct but Reason is incorrect.
- DIf both the Assertion and Reason are incorrect.
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Similar Questions
This question has Statement $-1$ and Statement $-2.$ Of the four choices given after the Statements,choose the one that best describes the two Statements.
Statement $-1:$ Short wave transmission is achieved due to the total internal reflection of the $e-m$ wave from an appropriate height in the ionosphere.
Statement $-2:$ Refractive index of the ionosphere is independent of the frequency of $e-m$ waves.
Statement $-1:$ Short wave transmission is achieved due to the total internal reflection of the $e-m$ wave from an appropriate height in the ionosphere.
Statement $-2:$ Refractive index of the ionosphere is independent of the frequency of $e-m$ waves.
DifficultJEE MAIN 2013
View SolutionMatch the following List-$I$ with the List-$II$:
List-$I$ List-$II$ $(A)$ Gauss's law $(I)$ Surface charge density $(B)$ Faraday's law $(II)$ Electric charge and energy conservation $(C)$ Ampere's law $(III)$ Change in magnetic flux $(D)$ Kirchhoff's law $(IV)$ Change in electric flux $(V)$ Total electric flux
| List-$I$ | List-$II$ |
|---|---|
| $(A)$ Gauss's law | $(I)$ Surface charge density |
| $(B)$ Faraday's law | $(II)$ Electric charge and energy conservation |
| $(C)$ Ampere's law | $(III)$ Change in magnetic flux |
| $(D)$ Kirchhoff's law | $(IV)$ Change in electric flux |
| $(V)$ Total electric flux |
For a $GPS$ navigation to track a mobile device,we use :-
Medium
View SolutionAssertion : Environmental damage has increased the amount of ozone in the atmosphere.
Reason : Increase of ozone increases the amount of ultraviolet radiation on earth.
Reason : Increase of ozone increases the amount of ultraviolet radiation on earth.
When an airplane flies over a television antenna,the picture on the $TV$ screen appears to flicker or shake slightly. This is due to:
Easy
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