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Star X is known to be 30.0 light years away and is 6.50 times larger than...

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Physics

Star X is known to be 30.0 light years away and is 6.50 timeslarger than the Sun. You observe that its spectrum peaks at awavelength of 350 nm. Assume it emits as a blackbody. The Sun has asurface temperature of 5770K.

a) What is the surface temperature of Star X? (K)

b) What is the ratio of power (luminosity) radiated by Star tothat of the Sun?

c) Derive an expression for the intensity of light, I, from starX as observed from Earth (ignore any absorption by our atmosphere).Your expression should be a function of T(surface temperature inK), R(radius of star), and d (distance to star).

d) Plug in to c) to compute the intensity of radiation from StarX arriving at Earth (W/m2 )

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