A blackbody is at a temperature of 2880 K . The energy of radiation emitted by this object with wavelength between 499 nm and 500 nm is U1 , between 999 nm and 1000 nm is U2 and between 1499 nm and 1500 nm is U3 . The Wien constant b=2.88×106 nm K . Then
a. U1=0
b. U3=0
c. U1>U2
d. U2>U1