A2oz

What is the magnitude of the complex conjugate?

Published in Mathematics 1 min read

The magnitude of the complex conjugate is the same as the magnitude of the original complex number.

Here's why:

  • A complex number is represented as a + bi, where a and b are real numbers and i is the imaginary unit (√-1).
  • The complex conjugate of a + bi is a - bi.
  • The magnitude of a complex number is calculated using the Pythagorean theorem: √(a² + b²).

Therefore, the magnitude of both a + bi and a - bi is √(a² + b²), confirming that the magnitudes are identical.

For example:

  • The complex number 3 + 4i has a magnitude of √(3² + 4²) = 5.
  • Its conjugate, 3 - 4i, also has a magnitude of √(3² + 4²) = 5.

In essence, the complex conjugate simply flips the sign of the imaginary part, leaving the real part and the magnitude unchanged.

Related Articles