The surface temperature of a star doubles but its radius is unchanged. Its luminosity is multiplied by:
From Paper 2: Advanced Physics II
14(a)4 marks
A star has a parallax angle of 0.025 arcseconds. Calculate its distance in parsecs and metres, and explain why this method is limited to nearby stars.
From Paper 2: Advanced Physics II
14(b)3 marks
A star of luminosity 3.83 × 10²⁶ W produces an intensity of 2.0 × 10⁻⁹ W m⁻² at Earth. Calculate its distance.
From Paper 2: Advanced Physics II
14(c)*6 marks
Describe the life cycle of a star of mass much greater than the Sun, from main sequence to final state.
From Paper 2: Advanced Physics II
14(d)4 marks
Explain how redshift is evidence for an expanding Universe, and how galaxy rotation curves are evidence for dark matter.
From Paper 3: General and Practical Principles in Physics
7(c)4 marks
The Sun's spectrum peaks at 502 nm. Calculate its surface temperature and use the luminosity to calculate its radius.
From Paper 3: General and Practical Principles in Physics
8(a)3 marks
Calculate the intensity of sunlight at the Earth's distance (1.50 × 10¹¹ m).
From Paper 3: General and Practical Principles in Physics
10(c)*6 marks
Discuss what astronomers know about the age and fate of the Universe, and why there is uncertainty.
Score 0 / 31 · 0 of 8 marked
This paper is written by Plasmo in the style of the Edexcel A-Level Physics exam. It is not a past paper and is not produced or endorsed by the exam board.
Space Exam Questions: Edexcel A-Level Physics | Plasmo