USAAAO 2015, Пробен кръг — Задача 16

USAAAO Practice Round 2015

Бележка

This round consists of 20 multiple-choice problems to be completed in 50 minutes. You may only use a scientific calculator and a table of constants during the test.

Условие

Star X has an apparent magnitude of 5.7 and is located 26.3 pc from the Sun. If there are 2.0 magnitudes of extinction to Star X, what its luminosity?

a. 1.6 solar luminosities

b. 8.0 solar luminosities

c. 9.8 solar luminosities

d. 19.6 solar luminosities

e. 25.6 solar luminosities

Отговори

Решение

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