EASY
AS and A Level
IMPORTANT
Earn 100
Define radiant flux intensity.
Important Questions on Astronomy and Cosmology
EASY
AS and A Level
IMPORTANT
Can you recall intensity of a wave and its units?
EASY
AS and A Level
IMPORTANT
State two factors that affect radiant flux intensity from a star.
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
(b) State the relationship between radiant flux intensity F and distance d from the centre of a star.
