EASY
AS and A Level
IMPORTANT
Earn 100
State two factors that affect radiant flux intensity from a star.
Important Questions on Astronomy and Cosmology
EASY
AS and A Level
IMPORTANT
The radiant flux intensity F of light from a lamp at a distance of is . Calculate F from the same lamp at a distance of . State any assumption(s) you make.
EASY
AS and A Level
IMPORTANT
Use data from Table to determine, to two significant figures:
(a) the distance of Sirius from the Earth in metres.
EASY
AS and A Level
IMPORTANT
Use data from Table to determine to two significant figures the luminosity (in W) of Canopus.
EASY
AS and A Level
IMPORTANT
Use data from Table to determine, to two significant figures the luminosity (in W) of Vega.
EASY
AS and A Level
IMPORTANT
Use data from table to determine two significant figures the radiant flux intensity measured at the Earth from Sirius.
EASY
AS and A Level
IMPORTANT
Use data from Table to determine, to two significant figures the radiant flux intensity measured at the Earth from Alpha Centauri.
EASY
AS and A Level
IMPORTANT
This question is about Sirius and Arcturus. With the help of calculations and data from Table, show that Sirius is brighter than Arcturus.
EASY
AS and A Level
IMPORTANT
The radiant flux intensity from a star measured at the Earth is . The luminosity of the star is . Calculate the distance of this star from the Earth in metres.
