… one can still say that quantum mechanics is the key to understanding magnetism. When one enters the first room with this key there are unexpected rooms beyond, but it is always the master key that unlocks each door.- John Hasbrouck Van Vleck ✦ Customize This Card SAVE: .PNG .JPG .SVG COPY DESIGN: ✦ EXTREME MIX THEME PATTERN FRAME CUSTOM BG: UPLOAD IMAGE ✕ CLEAR DIM: FONT: Playfair Display Cinzel Royal Cormorant EB Garamond Lora Editorial Merriweather Baskerville Roboto Slab Montserrat Raleway Oswald Bold Lato Clean Great Vibes Dancing Script Pacifico Caveat Brush Amatic SC RATIO: Auto Fit 4:5 Portrait 1:1 Square 5:4 Classic 16:9 Wide 9:16 Story 3:4 Poster RES: 1x Standard 2x HD (1080p) 3x Ultra (4K) 4x Extreme Print BG PAT TEXT FRAME … one can still say that quantum mechanics is the key to understanding magnetism. When one enters the first room with this key there are unexpected rooms beyond, but it is always the master key that unlocks each door.- John Hasbrouck Van Vleck