Greek Letter Psi (Ψ) - Uppercase and Lowercase Symbols #2007619 (License: Personal Use)

This high-contrast image displays the uppercase (Ψ) and lowercase (ψ) forms of the Greek letter Psi, rendered in a clean serif typeface against a solid black background. Psi is prominently used in psychology to symbolize the mind or psyche, and in quantum mechanics as the wave function symbol. Its elegant, symmetrical design makes it visually distinctive across scientific and academic contexts.

Used on educational websites, psychology course pages, science textbooks, or typography resources; targets users searching for Greek symbols, psychological terminology, or STEM notation guides.