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Universe — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsUniverse1 Mark
Question
The sun emits a light with maximum wavelength 510 mm while another star X emits a light with maximum wavelength of 350 nm. What is the ratio of surface temperature of sun and the star X (a) 2.1(b) 0.68(c) 0.46(d) 1.45
       
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Answer

(b) 0.68

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