USAAAO 2015, I кръг — Задача 20

USAAAO First Round 2015

Условие

If the hydrogen alpha line of a star, normally 656.3 nm, is observed to be 662.5 nm, what is the star's radial velocity relative to the Earth?
a. $2.83*10^6$ m/s
b. $-2.83*10^6$ m/s
c. 0.00945 m/s
d. -0.00945 m/s
e. $-2.83*10^3$ m/s

Отговори

Решение

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Оригинал в Архива: 2015-first-round-exam.pdf · официални решения: 2015-first-round-solutions.pdf