1THAnx...ankit..& Ankit...feeling a lot better now..
17 Answers
1i think i got your doubt...
think like this... does he whole 2piR2 surface recieve equal amount of energy ?
NO..
only the point directly facing sun recieves the whole energy..
other points receive parts of it ..
1
Why....Bhaiya....plz....see the diagram,,,,,,
the area receiving sun radiation is clearly half the surface area of Neptune...so....why dont we take,...2Î r2
1A is correct
energy emitted by sun is
σ 4πRs2 Ts4
Energy per unit area distributed in the sphere which passes thro neptune's orbit and has radius RSN ..
σ 4πRs2 Ts4/ 4πRSN2
= σ (Rs/ RSN)2 Ts4
energy absorbed by neptune
σ (Rs/ RSN)2 Ts4 * component of Area of neptune's surface on the sphere recieving the energy* aλ
=σ aλ (Rs/ RSN)2 π RN2 Ts4
... A
actually the area recieving the energy is a circle on the big sphere whose radius is equal to radius of neptune ...
1arrre yaar actually the are equal to the cross section of neptune is recieving the energy on the surface of the big sphere .. imagine karo na 3D ...
1solution mein area of neptune Î r2 liya hain......
kya is ke liye ki only one face is facing the sun??agar waisa hota to phi toh 2Î r^4 hona chaiye tha