Question 369: Properties of Matter

Question

A black body at 1227oC emits radiations with maximum intensity at a wavelength of 5000 $$\mathop A\limits^ \circ  $$. If the temperature of the body is increased by 1000oC, the maximum intensity will be observed at

Accepted Answer

Applying Wein's displacement law,
$${\lambda _m}T = contant$$
$$5000{\bf{{ÃÂ}}} 	imes \left( {1227 + 273} ight) = \left( {2227 + 273} ight) 	imes {\lambda _m}$$
$${\lambda _m} = {{5000 	imes 1500} \over {1000}} = 3000ÃÂ$$

Answer

3000 $$\mathop A\limits^ \circ  $$

Answer

4000$$\mathop A\limits^ \circ  $$

Answer

5000$$\mathop A\limits^ \circ  $$

Answer

6000$$\mathop A\limits^ \circ  $$

Properties of Matter

A black body at 1227oC emits radiations with maximum intensity at a wavelength of 5000 $\mathop A\limits^ \circ $. If the temperature of the body is increased by 1000oC, the maximum intensity will be observed at

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