What’s on the The EM Spectrum poster
A 7-row table: Type · Wavelength · Use.
In order of increasing frequency.
- Radio — > 1 m — Broadcasting, communications
- Microwave — 1 mm – 1 m — Radar, cooking, mobile
- Infrared — 700 nm – 1 mm — Heating, remote controls, thermal imaging
- Visible — 400–700 nm — Sight
- Ultraviolet — 10–400 nm — Sterilisation, fluorescence
- X-ray — 0.01–10 nm — Imaging, crystallography
- Gamma — < 0.01 nm — Sterilisation, radiotherapy
c = fλ. Higher frequency means shorter wavelength and higher photon energy, which is why gamma rays are ionising.
Questions about the The EM Spectrum poster
- What’s on the The EM Spectrum poster?
- A 7-row table: Type · Wavelength · Use. In order of increasing frequency. Radio — > 1 m — Broadcasting, communications; Microwave — 1 mm – 1 m — Radar, cooking, mobile; Infrared — 700 nm – 1 mm — Heating, remote controls, thermal imaging; Visible — 400–700 nm — Sight; Ultraviolet — 10–400 nm — Sterilisation, fluorescence; X-ray — 0.01–10 nm — Imaging, crystallography; Gamma — < 0.01 nm — Sterilisation, radiotherapy. c = fλ. Higher frequency means shorter wavelength and higher photon energy, which is why gamma rays are ionising.
- Who is the The EM Spectrum poster for?
- The EM Spectrum belongs to the Physics section rather than to a school year, because physical science is not something one grade owns. Anyone learning electromagnetism can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the The EM Spectrum poster?
- All travel at c in vacuum. Only wavelength and frequency differ. A wall chart earns its place by being glanceable from where the work is happening, so The EM Spectrum belongs on the wall where that physical science work actually happens, within glancing distance, rather than filed away.
- What other posters go with The EM Spectrum?
- AC Circuits, Capacitance and Circuit Basics sit alongside The EM Spectrum in the Physics section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.AC CircuitsCapacitanceCircuit Basics
- Is the The EM Spectrum poster free to download and print?
- Yes. The EM Spectrum downloads as a free PDF with no account, no email and no watermark, like everything else in the Physics section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the The EM Spectrum poster print at?
- The EM Spectrum is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of The EM Spectrum loses nothing.Printing guide
Related posters
Charts that sit alongside The EM Spectrum on the same wall.
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