StudentAidUnit 21: Space and Environment — Mcqs
12th Class Physics · Unit 21: Space and Environment
0 of 0 answered
0 correct
MCQ21.1.What does the term "luminosity" refer to in the context of stars?
MCQ21.2.Why are standard candles important in astronomy?
MCQ21.3.According to Wien's displacement law, when the surface temperature of a star increases, its peak wavelength of emitted radiation:
MCQ21.4.Which equation correctly represents the Stefan-Boltzmann law?
MCQ21.5.To estimate a star's radius, which combination of laws is most useful?
- a Inverse-square law and Hubble's law
- b Stefan-Boltzmann's law
- c Wien's law
- d Thermohaline circulation and Wien's law
MCQ21.6.What does a redshift in the spectral lines of a distant galaxy indicate?
- a The galaxy is cooling down
- b The galaxy is moving towards us
- c The galaxy is rotating faster
- d The wavelength of emitted light is increasing
MCQ21.7.Hubble's law states that the velocity of a galaxy is proportional to its:
MCQ21.8.Which of the following is not one of the five interacting components of Earth's climate system?
MCQ21.9.Why does air deflect to the right in the northern hemisphere?
MCQ21.10.The thermohaline circulation is primarily driven by