IF a material particle starts motion with speed equal to the speed of light, then mass of the moving particle will:
Correct answer: D. Become infinite
- A. Remain constant
- B. Become zero
- C. Become equal to rest mass of particle
- D. Become infinite
Explanation
Using the formula for mass dilationWhen an object travels at v = c, the factor becomes equal to zero.Dividing mo by zero leads to mass becoming equal to infinity.
This question appeared on the ETEA MDCAT 2006 paper, which you can sit online with every answer explained.
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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.
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