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relativistic mass

relativistic mass

9.9
The mass a moving object seems to have as its speed gets near the speed of light
  • noun
  • /ˌrɛlətɪˈvɪstɪk mæs/
  • Specialized
translation icon : masa relativista
  • The relativistic mass of an object increases as it approaches the speed of light.

So yes, light can push because it has momentum, it has no rest mass, but it does have relativistic mass.

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Examples

  • According to Einstein's theory, an object's relativistic mass increases as it approaches the speed of light.

  • In particle accelerators, the relativistic mass of subatomic particles rises significantly with their speed.

  • Physicists often distinguish between rest mass and relativistic mass when discussing bodies moving at high velocities.

  • Einstein's theory explains how relativistic mass is different from rest mass.

  • As an object moves closer to the speed of light, its relativistic mass increases significantly.

  • In high-energy physics experiments, scientists often measure the relativistic mass of particles to understand their behavior.

  • The concept of relativistic mass helps explain why objects require more energy to accelerate as they approach light speed.

How Massive

massiveness
1 5.4
relativistic mass
  • Specialized
9.9
rest mass
  • Specialized
1 7.4

Surface Forms

Morphology

relativistic + mass

The noun phrase is compositionally built: 'relativistic' specifies the relativistic context and 'mass' names the quantity, so the phrase straightforwardly means the mass as described by relativity (mass of a body in motion relative to an observer). Although the concept is technical, the adjective+noun combination follows normal compositional patterns and would be understandable to a learner who knows both constituent meanings.

Etymology

Relativistic mass comes from the picture of an object's mass looking larger when it goes at very high speed, called 'relativistic' speed. One simple image is a cart that seems to gain weight compared with its 'rest mass', so relativistic mass means the mass measured while the object is moving.