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There are several units of distance used in astrophysics that you need to be aware of: Astronomical Unit (AU) - The average distance between the centre of the Earth and the centre of the Sun. AU = 1 .50 × 10 11 m. Parsec (pc) - The distance at which the angle of parallax is 1 arcsecond (1/3600th of a degree).

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My Physics Workbooks: https://zphysicslessons.net/my-workbooks AQA A Level Astrophysics Physics Revision following the Specification. Please note that this i

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There are three key pieces of evidence to support the Big Bang theory: 1. Galactic redshift & Hubble's law. This provides strong evidence for the expansion of the Universe. 2. Cosmic Microwave Background Radiation (CMBR) This provides evidence that the Universe had a hot beginning. 3.

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Speed of light, = 3 × 10 8 m s −1. Diameter of EHT, = 8000 km = 8000 × 10 3 m. Step 2: Write down the equation for the minimum angular separation and substitute in the wave equation. Wave equation: Minimum angular separation: Step 3: Calculate the minimum angular separation the EHT can resolve. = 1.63 × 10 −10 rad.

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AQA Physics A-level. AQA Physics A-level. Topic 9: Astrophysics. Key Points. www.pmt.education. The Converging Lens. Lenses are used to change the path of light rays as they pass through, in order to focus or magnify an image. They achieve this through the process of refraction: As light passes into a optically denser medium, it will slow down

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During the Big Bang, Hydrogen was converted into Helium via nuclear fusion. The expansion of the universe caused it to cool, meaning it was no longer hot enough to fuse elements. About 1⁄4 of all Hydrogen was converted into Helium, resulting in a ratio of H:He of 3:1. The observed distribution of matter now is 73% hydrogen, 25% helium and 2%

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Astrophysics. Astrophysics is the study of the stars and the galaxies. You will be able to apply all that you have learnt throughout your A level to understand telescopes, the processes that govern stars, and their various end products, as well as the science of cosmology, or the origins of the universe as a whole.This fascinating topic is, in

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A level physics notes. A full set of A level physics notes free to download. Detailed notes written by experienced physics teacher covering the core topics of A/AS level physics. Written for the AQA exam board, but should be useful for all other exam boards, including Edexcel, CIE, OCR A, OCR B. You might also consider purchasing the workbooks

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Hubble analysed the red-shift of distant galaxies and came up with a graph whose gradient is inverse the age of the Universe. We call this gradient the Hubble constant or H0. It has been refined experimentally and we are currently thinking the Universe is about 14 billion years old. So that's the beginning sorted.

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Download pdf: http://scienceshorts.net/resourceshttps://teespring.com/en-GB/stores/science-shorts-shop-----00:00 Life cycle of stars01:

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Stars - The life of stars, including how they are formed and how they die. Spectral Classes - The way that stellar objects are classified. Supernovas and Black Holes - These are massive. 3.9.3 Cosmology. Cosmology - The cosmological principle. Spectra - We use these to determine the elements and compounds in faraway objects.

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Revision notes on 9.2.7 Emission & Absorption Spectra in Stars for the AQA A Level Physics syllabus, written by the Physics experts at Save My Exams. ... A Level Physics AQA Revision Notes 9. Astrophysics 9.2 Classification of Stars 9.2.7 Emission & Absorption Spectra in Stars. ... 4.6.2 Area Under a Force-Displacement Graph; 4.6.3 Efficiency;

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AQA Physics A-level Section 9: Astrophysics Notes 3.9 Telescopes Convex/converging lens - focuses incident light. Concave/diverging lens - spreads out incident light. Principal axis - the line passing through the centre of the lens at 90º to its surface Principal focus (F) - In a converging lens: the point where incident beams passing parallel to the principal axis will converge .

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Topic 9: Astrophysics. Absolute Magnitude (M): The apparent magnitude that an object would have if it were placed at a distance of 10 parsecs away from Earth. Achromatic Doublet: A convex lens made of crown glass and a concave lens made of flint glass cemented together in order to focus all light rays in the same position.

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Revision notes on 9.2.15 The Hertzsprung-Russell Diagram for the AQA A Level Physics syllabus, written by the Physics experts at Save My Exams. ... A Level Physics AQA Revision Notes 9. Astrophysics 9.2 Classification of Stars 9.2.15 The Hertzsprung-Russell Diagram. ... 4.6.2 Area Under a Force-Displacement Graph; 4.6.3 Efficiency;

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Topic 25: Astronomy and Cosmology. Notes. This work by PMT Education is licensed under CC BY-NC-ND 4.0. 25 - Astronomy and Cosmology. 25.1 - Standard Candles. The luminosity L of an astronomical object is the total power of the radiation it emits. The flux f. is akin to intensity as a measure of the radiation power per unit area.

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Step 3: Identify the stage of life cycle being asked about. This question is about the whole life cycle from formation to death. The common first five steps are needed, and then the steps which only apply to massive stars. Step 4: Plan the answer. Use the white space around the question to plan your answer.

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Answer: (a) An event horizon is: The boundary of the region around a black hole inside of which light cannot escape (b) Step 1: List the known quantities. Mass of the black hole, = 9.5 × 10 9 Mass of the Sun, = 1.99 × 10 30 kg (from the data booklet) Gravitational constant, = 6.67 × 10 -11 N m 2 kg -2 (from the data booklet) Speed of light, = 3.00 × 10 8 m s -1 (from the data booklet)

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There are several units of distance used in astrophysics that you should be aware of: Astronomical Unit (AU) - The average distance between the centre of the Earth and the centre of the Sun. AU = 1.5 x 1011 m. Parsec (pc) - The distance at which the angle of parallax is 1 arcsecond (1/3600th of a degree).

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1c 3 marks. A standard candle in a distant galaxy is found to have a luminosity of 2.0 × 10 36 W and a radiant flux intensity on Earth of 2.59 × 10 -15 W m -2. Show that the distance of the galaxy from the Earth is about 8 × 10 24 m. How did you do?