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Вопрос по физике:
Определите количество N фотонов, испускаемых за промежуток времени t = 1,0 источником света мощностью P = 100 Вт, ели длина волны излучаемого света лямбда = 2,0 мкм.-
Автор:
dickens
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Ответ:
Объяснение:
P*t=N*h*c/L N=P*t*L/h*c=100*1*2*10^-6/6,62*10^-34*3*10^8=10,1*10^20
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5x² - 4x = 0
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1)
1. They (start) work at 9:00 a m.
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12 Nike usually (come) home, (change) his clothes and (go) out again
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2)
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Вопрос по физике:
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