4 votes

What's the difference between the different kinds of EM waves?

X-rays...can exist at any given wavelength. That's not what "X-ray" means. In most cases,* when people say "X-ray," they are talking about a specific range of wavelengths/photon ...
Solomon Slow's user avatar
  • 14.6k
3 votes

What is a laser spectrum?

You are probably talking about the helium-neon laser: The best-known and most widely used He-Ne laser operates at a wavelength of $632.8$ nm (in air), in the red part of the visible spectrum. This ...
Thomas Fritsch's user avatar
3 votes
Accepted

What is the upper limit of size for diffracting an object?

As far as I know the largest object that has been successfully diffracted is a oligoporphyrin molecule with a molecular weight of about $25000$. This was done on 2019 and is reported in Quantum ...
John Rennie's user avatar
2 votes
Accepted

Emission spectrum of a fluorescent lamp

the emission lines you detect are only those that make it all the way through the phosphor coating on the inside of the CFL tube. Those phosphors are designed to absorb as much of the spectral output ...
niels nielsen's user avatar
2 votes

What's the difference between the different kinds of EM waves?

As was already pointed out, there is essentially no difference between different types of EM waves except their wavelengths (or, equivalently, the energy of the photons). However, there are certain ...
paulina's user avatar
  • 491
1 vote

What is the shortest MEASURED gamma ray wavelength?

In February 2024 researchers at China's Large High Altitude Shower Observatory reported the detection of a gamma ray with an energy of $2.5$ PeV. This corresponds to a wavelength of about $5 \times 10^...
gandalf61's user avatar
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1 vote

What is the upper limit of size for diffracting an object?

Electrons are a relatively light particle, and therefore have a relatively long De Broglie wavelength. Electrons have been diffracted through the spaces between atoms in a crystal. A proton is about $...
mmesser314's user avatar
  • 38.7k
1 vote
Accepted

How is wavelength defined when it's changing continuously?

Those are good ways. Though you can't make the time interval infinitesimal because you then can match any sine wave. If the function is slowly varying, the frequency doesn't change fast. You get a ...
mmesser314's user avatar
  • 38.7k

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