The electromagnetic spectrumविद्युत-चुंबकीय स्पेक्ट्रम

NCERT Fig 2.7 · interactive diagram

Parts and their functions

• Radio waves (रेडियो तरंगें) — Longest wavelength, lowest frequency (~10⁶ Hz) — used for broadcasting.
• Microwaves (सूक्ष्म तरंगें) — ~10¹⁰ Hz — used in radar and microwave ovens.
• Infrared (अवरक्त) — ~10¹³ Hz — heat radiation.
• Visible light (400–750 nm) (दृश्य प्रकाश (400–750 nm)) — The only part our eyes can see: violet (≈400 nm, highest ν) to red (≈750 nm, lowest ν).
• Ultraviolet (पराबैंगनी) — ~10¹⁶ Hz — the Sun’s UV causes sunburn; ozone absorbs much of it.
• X-rays (X-किरणें) — ~10¹⁸ Hz — pass through soft tissue; used in medical imaging.
• Gamma rays / cosmic rays (गामा किरणें / कॉस्मिक किरणें) — Shortest wavelength, highest frequency and energy.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 2.7. Report a mistake