Light
Yes, for a particle moving in a straight line, its angular momentum is zero with respect to any arbitrary axis. This is because angular momentum is defined as the cross product of the position vector and momentum vector of the particle, and since they lie along the same line for straight-line motion, the cross product will result in zero.
The common definition of 'light' (visible) is electromagnetic radiation visible to the human eye. It is only a small part of what is known as the 'electromagnetic spectrum' - which is the range of wavelengths of all possible electromagnetic radiation. Light is electromagnetic radiation, as reported. But, even though it behaves like a wave, it also behaves as a particle. We can call a particle of light a photon. Light has two identities, a "duality" of sorts, that is called wave-particle duality. That's about as simple as it can get. Light is called a "wavicle" by some, and for reason that it displays qualities of both a wave and a particle.
Radioactivity is the term defined as the emission of energy from subatomic particles.
Radiation
Radiation absorbed dose (rad) is a unit used to quantify the amount of energy absorbed from ionizing radiation by a material or tissue. It is defined as the energy deposited by ionizing radiation per unit mass of the absorbing material.
Yes, for a particle moving in a straight line, its angular momentum is zero with respect to any arbitrary axis. This is because angular momentum is defined as the cross product of the position vector and momentum vector of the particle, and since they lie along the same line for straight-line motion, the cross product will result in zero.
yes when defined as a wave, no as a particle
The common definition of 'light' (visible) is electromagnetic radiation visible to the human eye. It is only a small part of what is known as the 'electromagnetic spectrum' - which is the range of wavelengths of all possible electromagnetic radiation. Light is electromagnetic radiation, as reported. But, even though it behaves like a wave, it also behaves as a particle. We can call a particle of light a photon. Light has two identities, a "duality" of sorts, that is called wave-particle duality. That's about as simple as it can get. Light is called a "wavicle" by some, and for reason that it displays qualities of both a wave and a particle.
by a particle called higgs boson
smallest particle of an element that retains the properties of that element.
Schultze defined the cell as "a particle of protoplasm with a nucleus."
Radiation
No because a defined straight line has 2 end points.
Under the International System of Units, the second is currently defined as : The second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom
Radioactivity is the term defined as the emission of energy from subatomic particles.
Radiation
particle pollution