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Why is the golden ratio constant in scipy.constants considered an irrational number?

hard📝 Conceptual Q10 of 15
SciPy - Constants and Special Functions
Why is the golden ratio constant in scipy.constants considered an irrational number?
ABecause it is defined as the sum of pi and e
BBecause it is exactly equal to 3.14
CBecause it is a rational number with repeating decimals
DBecause it cannot be expressed as a simple fraction and has an infinite non-repeating decimal expansion
Step-by-Step Solution
Solution:
  1. Step 1: Understand irrational numbers

    An irrational number cannot be expressed as a fraction and has infinite non-repeating decimals.
  2. Step 2: Apply to golden ratio

    The golden ratio is known to be irrational, approximately 1.618..., with infinite non-repeating decimals.
  3. Step 3: Eliminate wrong options

    It is not equal to 3.14 (pi), not rational, and not defined as sum of pi and e.
  4. Final Answer:

    Because it cannot be expressed as a simple fraction and has an infinite non-repeating decimal expansion -> Option D
  5. Quick Check:

    Golden ratio is irrational by definition [OK]
Quick Trick: Irrational means no exact fraction, infinite decimals [OK]
Common Mistakes:
MISTAKES
  • Confusing with pi
  • Thinking it is rational
  • Believing it is sum of pi and e

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