An object of temperature T emits thermal radiation with varying wavelengths. Radiation with a wavelength of 580 micrometers has maximum intensity. If the temperature of the object is increased to 2T, then the wavelength of radiation with maximum intensity turns into ....
A. 72.5 micrometer
B. 145 micrometers
C. 290 micrometers
D. 580 micrometers
E. 1160 micrometers
Answers
Answered by
1
T1 = T, λ1 = 590 nm
T2 = 2T, λ2 = __?
according to Wien shift law
λ T = constant
λ is inversely proportional to absolute temperature
If the absolute temperature used 2 original back, ½ times the wavelength to
be reproduced or ½ × (580 gm) = 290 μm
T2 = 2T, λ2 = __?
according to Wien shift law
λ T = constant
λ is inversely proportional to absolute temperature
If the absolute temperature used 2 original back, ½ times the wavelength to
be reproduced or ½ × (580 gm) = 290 μm
Answered by
1
according to Weins displacement Law ,
λmax × T = b
where b is constant,
hence,
λ α 1/T
so,
λ1T1 = λ2T2
here given,
λ1 = 580 μm
T1 = T
λ2 = ?
T2 = 2T
580 × T = λ2× 2T
λ2 = 580/2 = 290 μm
hence option (c) is correct
λmax × T = b
where b is constant,
hence,
λ α 1/T
so,
λ1T1 = λ2T2
here given,
λ1 = 580 μm
T1 = T
λ2 = ?
T2 = 2T
580 × T = λ2× 2T
λ2 = 580/2 = 290 μm
hence option (c) is correct
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