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← Topic 25 overviewTOPIC 25 ASSESSMENT

Astronomy and cosmology

CIE-style questions assess luminosity, radiant flux intensity, standard candles, Wien's law, the Stefan-Boltzmann law, redshift, Hubble's law and the Big Bang model.

Objective question 1

Luminosity is measured in:

Objective question 2

A standard candle is useful because its:

Objective question 3

Wien's displacement law links peak wavelength to:

Objective question 4

A spectral line shifted to longer wavelength is:

Objective question 5

In a v against d graph, H₀ is the:

Structured question 1

A star has L = 5.0 × 10²⁸ W and is 2.0 × 10¹⁸ m away. Calculate radiant flux intensity F.

Structured question 2

A star's spectrum peaks at 460 nm. Using Wien's constant 2.90 × 10⁻³ m K, calculate its temperature.

Structured question 3

A spectral line shifts from 600.0 nm to 600.9 nm. Calculate recession speed using c = 3.00 × 10⁸ m s⁻¹.