In the special theory of relativity, when an object is at rest position with respect to an observer, the mass of the object (mo) will be called as
Correct answer: A. rest mass.
- A. rest mass.
- B. inertial mass.
- C. active gravitational mass.
- D. passive gravitational mass.
Explanation
In the special theory of relativity, when an object is at rest position with respect to an observer, the mass of the object is called the rest mass. This term specifically refers to the mass of an object when it is not in motion relative to the observer. The other options, inertial mass, active gravitational mass, and passive gravitational mass, do not specifically describe the mass of an object at rest position and are therefore incorrect in this context.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Quantum Theory and Radiation
Quantum theory treats electromagnetic radiation as packets of energy called photons, with energy proportional to frequency through E equals hf. The topic covers Planck's hypothesis, photon momentum, the photoelectric effect, threshold frequency, work function and wave particle duality, distinguishing quantised energy exchange from classical continuous radiation.
Practise Dawn of Modern Physics
739 free Dawn of Modern Physics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Quantum Theory and Radiation questions
The thermal radiations emitted by a body at low temperature is of
Laser can only be produced if an atom is in itsI. normal stateII. excited stateIII. ionized state
The range of wavelength of radiations emitted by a hot body at different temperature is
In the special theory of relativity, if a body is moving with the velocity which is close to the velocity of light, then the apparent length of the body as compared to its original length
The given wavelength-energy graph shows the radiation emitted by a blackbody. Which of the following options shows the CORRECT relationship among T1, T2 and T3?
A blacksmith is heating an iron axe on a high degree burner. While heating the axe, he noted that different colours are produced. Which of the following colours shows the highest temperature of the iron axe?