RADAR Method for Measuring Length
The RADAR method is used to measure length (distance). RADAR stands for Radio Detection and Ranging.
How it works:
- RADAR systems emit radio waves towards an object.
- The time taken for the waves to travel to the object and reflect back is measured.
- Using the known speed of radio waves (approximately the speed of light, $c$), the distance ($d$) can be calculated with the formula:
$d = \frac{c \times t}{2}$
where $t$ is the total time for the round trip. This calculation directly gives the length or distance to the object.
Why Other Methods Are Unsuitable for Length Measurement
- Dimensional method: This involves dimensional analysis, relating physical quantities, not directly measuring length.
- Pendulum method: Primarily used for measuring time periods or acceleration due to gravity, not length directly.
- Angular method: Measures angles. While angles can be used in techniques like triangulation to determine distances, it's not a direct method for measuring linear length itself in the way RADAR is.
Therefore, the RADAR method is the correct choice for measuring length among the given options.
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A. Berlin Wall is constructed
B. Communist China joins the UN
C. Soviet invasion of Czechoslovakia
D. Berlin Blockade
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B. Politics is an autonomous sphere of action and cannot therefore be reduced to morals
C. International Politics is an arena of conflicting self-interests
D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?
