(Solved): (a) Calculate the intensity of the emitted light at distance d (in nW/m2 ). nW/m2 (b) What is the p ...

(a) Calculate the intensity of the emitted light at distance $d$ (in $\mathrm{nW}/{\mathrm{m}}^2$ ). $\mathrm{nW}/{\mathrm{m}}^2$ (b) What is the power of the emitted light intercepted by the Earth (in $\mathrm{kW}$ )? (The radius of Earth is $6.37\times 10^6\mathrm{m}$.) $\mathrm{kW}$ average distance of these objects from the Earth is $10.0\mathrm{ly}$, find the following. (c) the ratio of the total intensity of starlight from these 90 stars to the intensity of the single bright star found in part (a) $\frac{I_{\mathrm{dwarf}\text{ stars }}}{I_{\text{single star }}}=$ (d) the ratio of the total power the Earth intercepts from these stars to the power intercepted from the bright star in part (b) $\frac{P_{\text{dwarf stars }}}{P_{\text{single star }}}=$