Edexcel A level Physics Astrophysics
June 2024 Exam Questions and Answers
100% Pass
What is a black body? - Answer>>A black body is a perfect
radiator and absorber of EM radiation. It gives off energy across
the entire EM spectrum (ie at all different wavelengths).
What is lambda max? - Answer>>Wavelength where you get
peak energy output
Which law tells you how bright a star is? - Answer>>Stefan-
Boltzmann law
Define luminosity - Answer>>Power measured at the star / The
rate at which energy is radiated in all directions by an object
What do you measure luminosity in? - Answer>>Watts
What is the radiant energy flux/intensity? - Answer>>Power per
unit area at distance d
How do you work out the time period of a standard candle? -
Answer>>You need to take it twice and mean average it
How far is a light year in metres? - Answer>>9.46 x 10^15m
What is one astronomical unit? - Answer>>The radius of the
Earth's orbit around the sun
Define parallax - Answer>>The apparent motion of an object,
relative to its background, when it is viewed from different
positions.
, How is the amount of parallax used? - Answer>>To determine
its parallax angle.
How do you increase the percentage certainty of measurements
of nearby stars? - Answer>>Use the diameter of the Earth's
orbit as a baseline, taking measurements 6 months apart.
How many arc seconds are there in a degree? - Answer>>3600
What is the equation for distance in parsecs? -
Answer>>Distance = 1/ angle (arcsec)
What is the doppler effect? - Answer>>The relative change in
the wavelength and frequency of a wave due to relative motion
between a source and a observer.
What is the spectrum of absorption lines of elements observed
from distant galaxies is similar to but not the same as? -
Answer>>The absorption lines as observed in the lab.
What does the letter Z mean? - Answer>>The amount of
redshift.
What does the positive and negative values of red shift mean? -
Answer>>Positive value means red shift as its moving away.
Negative value means blue shift as moving towards.
Why is the x axis of a Hertzsprung-Russel diagram log T? -
Answer>>The range of temperatures of the surfaces of stars is
large
Classify a neutron star - Answer>>Core remnant
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller RevisionKing. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £5.77. You're not tied to anything after your purchase.
