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Very large distances such as to a planet are measured by:
AA ruler
BA tape
CA chain
DParallax
Answer & Solution
Correct answer: D. Parallax
1. No measuring instrument reaches that far.
2. The object is instead viewed from two positions.
3. That is the parallax method.
_Source: NCERT Class 11 Physics Part I, Chapter 2, Units and Measurement._
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