What does “Electromagnetic spectrum” actually mean in Electromagnetic Waves, and why does it matter for JEE?
Radio, microwave, infrared, visible, ultraviolet, X-ray and gamma radiation are the same kind of wave ordered by increasing frequency. Higher frequency means shorter wavelength and greater photon energy.
In simple words: Radio, microwave, infrared, visible, ultraviolet, X-ray and gamma radiation are the same kind of wave ordered by increasing frequency. Higher frequency means shorter wavelength and greater photon energy. Getting Electromagnetic spectrum clear matters because JEE questions on Electromagnetic Waves usually test this idea directly, not just a formula you memorised.
Key point
Electromagnetic spectrum
Common mistake
ordering the spectrum by wavelength in the same direction as frequency.
Memory tip
frequency up means wavelength down and photon energy up.
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