Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoRadiationEasy2 minPYQ_2015
PhysicsEasyinteger

Two spherical starsAandBemit blackbody radiation. The radius ofAis 400 times that ofBandAemits104times the power emitted fromB. The ratioλAλBof their wavelengthsλAandλBat which the peaks occur in their respective radiation curves is

Answer:
2
Solution:

P=eσAT4
λT=constant
PAPB=eσAATA4eσABTB4=AAABTA4TB4=rA2rB2.λB4λA4
104=4002.λBλA4
10416×104=λBλA4
λAλB=16114=2

Stream:JEE_ADVSubject:PhysicsTopic:Heat & ThermoSubtopic:Radiation
2mℹ️ Source: PYQ_2015

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