IOM 2021, Блиц — Задача 60

The Blitz-contest of IOM-2021

Условие

Peter observes an image of the Moon on a screen after the light passes through a convex lens. What is the diameter of the image on the screen if the focal length of the lens is $200$ mm? The apparent diameter of the Moon is $0.50^{\circ}$. Answer should be given in millimeters and rounded to the first decimal.

Отговори

Решение

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Оригинал в Архива: iom-2021-blitz-tasks-eng.pdf · официални решения: iom-2021-blitz-answers-eng.pdf