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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 emission line of Lyman corresponds to the absorption line in laboratory temperature
- You are marooned on a frictionless horizontal plane and cannot exert any horizontal
- An electric kettle has two heating elements. One brings it to boil in ten minutes
- A particle of mass m is projected with a velocity v making an angle of 45°
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Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The emission line of Lyman corresponds to the absorption line in laboratory temperature
- You are marooned on a frictionless horizontal plane and cannot exert any horizontal
- An electric kettle has two heating elements. One brings it to boil in ten minutes
- A particle of mass m is projected with a velocity v making an angle of 45°
- A light emitting diode(LED) has a voltage drop of 2 volt across it
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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