both the heating effect of current and hysteresis loss
In alternating current a power dissipation due to heating effect p=i2R so heat is produce and eddy current produce in transformer also and they absorbed by circulating oil so heat produce due to both phenomenon.
Fermi
Fermi - A unit of length equal to 10-15 meter (one femtometer), used in nuclear physics. It is similar to the diameter of a proton.
distance
1 light year is equal to 9460730472580.8 km.
unequal heating of different parts of the atmosphere
The Above Phenomenon is a great example of TOTAL INTERNAL REFLACTION, Which comes in account when light travels from denser medium to rearer medium, after some specific angle it again reflacts into the denser medium. Similar kind of activity happens in desert area called Mirage or Marichica.
8 minutes
Speed of light = 3x108 m/s. Distance between the earth & the Sun is = 150000000 KM. So the time taken by light to cover this. Distance is = 150000000000 m/3x1108 m/s => 500 sec. /60 => 8 min. 20 sec.