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The most penetrating X-rays are the highest frequency (shortest wavelength) X-rays. They are the most energetic, and we sometimes refer to them as hard X-rays.
Typically, most pocket red laser pointers have wavelengths that range between 630nm and 680nm. A helium neon red laser pointer has a wavelength of 633nm.
Primary rays are the best to penetrate Low wavelength
Those are the ones with the highest frequency/shortest wavelength/most energy per photon. Most . . . gamma rays Next most . . . X-rays . . . Least . . . low-frequency radio waves
alpha, beta, gamma
X-rays and Gamma rays are the two most penetrating rays in the electromagnetic spectrum.
Well... Most LEDs, Light Emitting Diodes, have a very narrow wavelength span, so they'd fit part of your question. However, they're not always that intense. So you're probably asking about a LASER.
The most penetrating power is for beta particles compared to those given here.
Gamma rays have the shortest wavelength compared to most of other electromagnetic radiation. Gamma rays have high penetrating power and are high in frequency. Exposure to this type of radiation can cause many health complications.
gamma
the neutrino
gamma