What you're seeing when you put it through a prism is that you heat hydrogen up and it doesn't just glow like a white light, it just emits light at particular colors, a red one, a light blue one, some dark blue ones.
Ono što vidite kada svjetlost pustite kroz prizmu i kada zagrijete vodik on neće samo isijavati bijelu svjetlost, već emitira svjetlost posebnih boja, crvenu, svjetlo plavu, tamno plavu.