Co-efficient of reflection, coefficient of absorption and coefficient transmission are related as
A black body is at a temperature of 500K. it emits energy at a rate which is proportional to |
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The coefficient of absorption of perfectly black body is |
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The wavelength of maximum energy released during an atomic explosion was 2.93 × $10^{-10}$m. The maximum temperature attained must be (Wien’s constant = 2.93 × $10^{-3}$mK) |
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If a = 0.72, r = 0.24, then the value of t is |
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A body cools from 50°C to 46°C in 5 minutes and to 40°C in the next 10 minutes. The surrounding temperature is |
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Emissivity of perfectly black body is |
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The wavelength of maximum energy release during an atomic explosion was 2.93 × 10-10 m. the maximum temperature attained must be (Wein’s constant = 2.93 × 10-3 mK) |
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Which of the following will radiate heat to large extent? |
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Which of the following statement is wrong? |
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The rate of radiation of black body at 0°C is E watt. The n the rate of radiation of this black body at 273°C will be |
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