
1) They gave the Hulk his powers 2) What gave the Hulk his powers
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(-rays) gamma radiation. A very high energy form of electromagnetic radiation, typically with wavelengths of less than 3 pm. Gamma rays are produced by certain nuclear decay processes, and are used to sterilize food.
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http://antoine.frostburg.edu/chem/senese/101/glossary/g.shtml

• Very penetrating rays not appreciably deflected by a magnetic or electric field, emitted by radioactive substances. The prevailing view is that they are non-periodic ether pulses differing from Rontgen rays only in being more penetrating.
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http://thinkexist.com/dictionary/meaning/gamma_rays/

One of the three types of rays produced by radioactive disintegration, but gamma rays are the only one comprised of electromagnetic radiation. Gamma rays have a very short wavelength, and have the greatest penetrative power of all radioactive emissions.
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http://www.chemicalglossary.net/definition/821-Gamma_Rays

High-energy ionising radiation emitted by radioactive material.
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http://www.em-surveys.co.uk/Definitions%201.html

High energy electro-magnetic radiation from the atomic nucleus, virtually identical to X-rays
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http://www.encyclo.co.uk/local/20725

High energy electro-magnetic radiation.
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A type of radiation of shorter wavelength and higher energy than kilovoltage x-rays used for diagnosis.
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http://www.encyclo.co.uk/local/20892

γ-rays electromagnetic emissions from radioactive substances; they are similar to and have the same general properties as x-rays but are produced through the disintegration of certain radioactive elements. They consist of high energy photons, have short wavelengths, and have no mass and no electric charge. Gamma rays are sometime...
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http://www.encyclo.co.uk/local/21001

High energy electro-magnetic radiation.
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http://www.encyclo.co.uk/local/21076

photons of high energy. The most energetic forms of light are known as gamma rays.
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http://www.encyclo.co.uk/local/21425

high-energy electromagnetic radiation emitted by certain radionuclides when their nuclei transition from a higher to a lower energy state. These rays have high energy and a short wave length. All gamma rays emitted from a given isotope have the same energy, a characteristic that enables scientists to identify which gamma emitters are present in a ...
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Form of electromagnetic radiation which contains the shortest wavelength of the spectrum. Gamma rays easily penetrate matter because of their short wavelength.
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http://www.encyclo.co.uk/local/22291

High energy radiation (energies in excess of 100 keV) observed during large, extremely energetic solar FLARES.
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Electromagnetic radiation in the neighborhood of 100 femtometers wavelength.
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http://www.encyclo.co.uk/visitor-contributions.php

High energy electro-magnetic radiation from the atomic nucleus, virtually identical to X-rays.
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http://www.encyclo.co.uk/visitor-contributions.php

One of the three types of rays produced by radioactive disintegration, but gamma rays are the only one comprised of electromagnetic radiation. Gamma rays have a very short wavelength, and have the greatest penetrative power of all radioactive emissions.
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http://www.encyclo.co.uk/visitor-contributions.php
Gam'ma rays (Physics) Very penetrating rays not appreciably deflected by a magnetic or electric field, emitted by radioactive substances. The prevailing view is that they are non- periodic ether pulses differing from Röntgen rays only in being more penetrating.
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http://www.encyclo.co.uk/webster/G/7

Gamma Rays are a type of high energy Electromagnetic Electromagnetic spectrum in the form of Photons which have no mass. In Radioactive Decay they originate from changes in the structure and energy levels of the Atomic Nucleus , or, through electron-positron annihilation or by nuclear fission Gamma rays travel greater distances than either Alpha P....
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http://www.ionactive.co.uk/glossary_atoz.html?s=az&t=g

Gamma Rays are a short, intense burst of electromagnetic radiation emitted by an unstable nucleus of radioactive material. Gamma rays have no electrical charge and can penetrate even thick lead and concrete.
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http://www.probertencyclopaedia.com/browse/GG.HTM

A highly penetrating type of nuclear radiation, similar to x-rays and light, except that it comes from within the nucleus of an atom, and, in general, has a shorter wavelength. Gamma rays emission is a decay mode by which excited state of a nucleus de-excite to lower (more stable) state in the same nucleus. In our diagrams, a gamma ray is represent...
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https://www.encyclo.co.uk/local/20039

Gamma rays are electromagnetic waves or photons emitted from the nucleus of an atom, typically with wavelengths of less than 3 pm. A highly penetrating type of nuclear radiation. Gamma ray emission is a decay mode by which the excited state of a nucleus de-excite to lower (more stable) state in the same nucleus.Wavelengths from about 10-14
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https://www.encyclo.co.uk/local/20687

A highly penetrating type of nuclear radiation, similar to x-rays and light, except that it comes from within the nucleus of an atom, and, in general, has a shorter wavelength. Gamma rays emission is a decay mode by which excited state of a nucleus de-excite to lower (more stable) state in the same nucleus. In our diagrams, a gamma ray is represent...
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https://www.encyclo.co.uk/local/21092

Gamma rays are electromagnetic waves or photons emitted from the nucleus (center) of an atom. See also: photon.
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https://www.encyclo.co.uk/local/21257

High energy electro-magnetic radiation from the atomic nucleus, virtually identical to X-rays.
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https://www.world-nuclear.org/nuclear-basics/glossary.aspx
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