Предмет: Физика, автор: helllloooooo

помогите прошу вас!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
какую кинетическую энергию имеет фотоэлектрон вырванное светом частатой 2,5*10(-15)Гц с поверхности лития

Ответы

Автор ответа: fatt52
1

A=3.8-10^-19 Дж (Работа выхода для лития)   h=6.62*10^-34 (постоянная Планка) v=2.5*10^15 Гц    Ek=?

h*v=A+Ek       Ek=h*v-A=6.62*10^-34*2.5*10^15 - 3.8*10^-19=12.75*10^-19 Дж

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