Astrophysics and Cosmology 390-ERS-2ASK
Konwersatorium (KON) Rok akademicki 2020/21

The written exam in the form of a test (answer to questions and solve exercises) will be at the end of the colloquium seminars.

In the case of the test.

0-49% correct answers - 2.0 (F)

50-59% - 3.0 (E)

60-69% - 3.5 (D)

70-79% - 4.0 (C)

80-89% - 4.5 (B)

90-100% - 5.0 (A)

Subjects realized at the colloquium seminars:

All exercises are related to the mentioned above topics.

Inter alia:

1. Plank's law (Planck function, Wien, Rayleigh-Jeans formulas), Wien's displacement law, Stefan-Boltzman law, the temperature of the Sun;

2. Virial theorem in practice. The potential energy of a star.

3. The thermal, the dynamic, and nuclear time-scales.

4. Estimation of the efficiency of energy production in a star, proton-proton chain. Estimation of a neutrino flux approaching our head.

5. Estimation of the central temperature and pressure in a star.

6. Estimation of the Jeans mass and length for a molecular cloud.

7. Binary stars: the Lagrangian points. the Algol paradox, the Eddington luminosity.

8. Estimation of the Chandrasekhar mass.

9. Estimation of basic parameters of white dwarfs, neutron stars, and black holes.

10. Gravitational waves: the power radiated by a binary system.

11. The Olbers' paradox, Hubble-Lemaître law, Hubble time, Hubble horizon distance.

12. Cosmic microwave radiation:

13. Dark matter.

The class will be in the classroom using a blackborad.