Предмет: Физика, автор: Semen8991

На плоскопараллельную пластинку, имеющую показатель преломления 1,57, падает луч света под углом 40 .
Проходя через пластинку, он смещается на 3 см. Определите толщину пластинки.

Помогите пожалуйста, ответ 10 см!

Ответы

Автор ответа: sokolovvovikn

Пусть смещение равно x=3см, толщина h

sina/sinb=n sinb=sina/n=sin40/1,57=0,41
b=arcsin(0,41)=24 градуса
h/cos24=x/sin(40-24)
h=x*cos24/sin16=3*0,914/0,27=10 см

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