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قديم 11-14-2016, 10:19 PM   #7
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الصورة الرمزية عـــــذاري
عـــــذاري غير متواجد حالياً

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 تاريخ التسجيل :  Jun 2013
 أخر زيارة : 01-14-2024 (07:13 PM)
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الاوسمة

افتراضي




Modern Physics




69- The particle behavior of light is proven by the photoelectric effect.
70- A photon is a particle of light {wave packet}.
71- Large objects have very short wavelengths when moving and thus can not be observed behaving as a wave. (DeBroglie Waves)
72-All electromagnetic waves originate from accelerating charged particles.
73- The frequency of a light wave determines its energy (E = hf).
74- The lowest energy state of a atom is called the ground state.
75- Increasing light frequency increases the kinetic energy of the emitted photo-electrons.
76- As the threshold frequency increase for a photo-cell (photo emissive material) the work function also increases.
77- Increasing light intensity increases the number of emitted photo-electrons but not their KE.




 
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