Summary Edexcel A Level Physics Student Book 2 - Unit 10 - Space
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Course
Unit 10 - Space
Institution
PEARSON (PEARSON)
Book
Edexcel A Level Physics Student Book 2
Comprehensive revision notes on Space from the Edexcel Physics A Level syllabus from an A* student in the 23/24 exam cycle. Complete with labelled diagrams and thoroughly fact checked and up to date.
Summary Edexcel A Level Physics Student Book 2 - Unit 13 - Oscillations
Summary Edexcel A Level Physics Student Book 2 - Unit 12 - Gravitional Fields
Summary Edexcel A Level Physics Student Book 2 - Unit 11 - Nuclear Radiation
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Written for
A/AS Level
PEARSON (PEARSON)
Phsyics 2015 Content-led approach
Unit 10 - Space
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Space
, ① Intensity and Luminosity
·
Luminosity
(L) : is the rate of light energy released or power output of a star.
·
Intensity (1) : is the luminosity per unit crea from star a
I :
intensity
Unit= Wm-2
=
-
Luminosity
I d = distance from source (star)
·
Intensity follows the inverse square low meaning it is
inversely proportional
to the square of the distance between the star and observer .
·
A standard candle is an object of known
luminosity Ce g .
. .
Cepheid variable stars
You can measure astronomical distances by the intensity detected
measuring
-
from the light source on Earth and using the inverse square lamequation :
L
d
-
= 4 I
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