- #1
lquinnl
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Homework Statement
OK so I'm doing a past exam paper as some revision:
The central galaxy in the Perseus cluster has an X-ray spectrum in wavelength units
which is well described by the power law
[tex] F_\lambda \propto \lambda^{-2} [/tex] .
If the spectrum in frequency units is described by
[tex] F_v \propto v^\beta [/tex],
calculate [tex]\beta[/tex] .
Homework Equations
Obviously we have [tex] v = \frac{c}{\lambda} [/tex]
The Attempt at a Solution
so if [tex] v = \frac{c}{\lambda} [/tex]
then does that mean that [tex] \beta = -3 [/tex]
I feel like I am really missing the point here. Any help would be greatly appreciated.
Thanks in advance!