The relativistic length of a moving object will be
Correct answer: B. Decreased
- A. Remain same
- B. Decreased
- C. Increased
- D. Doubled
Explanation
The relativistic length of a moving object will be decreased, as seen by an observer moving relative to the object. This is a consequence of the special theory of relativity, which states that the length of an object is contracted along the direction of motion when it is moving at relativistic speeds.
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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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