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A piece of iron is heated in a flame. It first comes dull red then becomes reddish yellow and finally turns to white hot. The correct explanation for the above observation is possible by using
Options
(a) Wien’s displacement law
(b) Kirchoff’s law
(c) Newton’s law of cooling
(d) Stefan’s law
Correct Answer:
Wien’s displacement law
Explanation:
Wien’s displacement law, According to this law,
λmax ∞ 1 / T or λmax x T = constant. So, as the temperature increases λ decreases.
Related Questions: - The electric field associated with an e.m. wave in vacuum is given by
- The emission line of Lyman corresponds to the absorption line in laboratory temperature
- If |A x B|= √3 A.B , then the value of |A + B| is
- If two electric bulbs have 40 W and 60 W ratings at 220 V, then the ratio
- A electric dipole is placed at an angle of 30⁰ to a non-uniform electric field.
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The electric field associated with an e.m. wave in vacuum is given by
- The emission line of Lyman corresponds to the absorption line in laboratory temperature
- If |A x B|= √3 A.B , then the value of |A + B| is
- If two electric bulbs have 40 W and 60 W ratings at 220 V, then the ratio
- A electric dipole is placed at an angle of 30⁰ to a non-uniform electric field.
Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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