Physics Thermometry, Thermal Expansion and Calorimetry Heat Transfer - Radiation MCQ (Single Correct)

Two spherical black-bodies and , having radii and , where emit radiations with peak intensities at wavelengths 400 nm and 800 nm, respectively. If their temperature are and , respectively, in Kelvin scale, their emissive powers are and and energies emitted per second are and , then:

A
B

C
D

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The correct answer is:
B

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