Due to the relative motion of observer and frame of reference time:
Correct answer: A. Dilates
- A. Dilates
- B. Contracts
- C. Constant
- D. Uniform
Explanation
Special relativity predicts time dilation: a clock moving relative to an observer is measured to run more slowly, so the time interval appears longer. Students often choose contracts by confusing time dilation with length contraction, which applies to lengths along the direction of motion.
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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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