EasyChemistryHigh School (11–12)Structure of the Atom › Light, Atomic Spectra and the Bohr ModelConceptual
Arrange these in order of increasing frequency: microwaves, X-rays, visible light, radio waves…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Arrange these in order of increasing frequency: microwaves, X-rays, visible light, radio waves, infrared, ultraviolet. Which has the longest wavelength, and which carries the most energy per photon?
Need a reminder? The key ideaShow
with , and the wavenumber is . In order of rising frequency: radio, microwave, infrared, visible, ultraviolet, X-rays, gamma rays.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Order. Radio waves, microwaves, infrared, visible light, ultraviolet, X-rays.
Step 2. Longest wavelength. Radio waves, at the low-frequency end.
Step 3. Most energy per photon. X-rays, at the high-frequency end, since .
Answer: as in step 1; radio waves are longest, and X-ray photons carry the most energy.
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