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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: - During negative β-decay
- A siren emitting sound of frequency 800 Hz is going away from a static listener
- The area of cross-section of one limb of an U-tube is twice that of the other.
- Which logic gate is represented by the following combination of logic gate?
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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
- During negative β-decay
- A siren emitting sound of frequency 800 Hz is going away from a static listener
- The area of cross-section of one limb of an U-tube is twice that of the other.
- Which logic gate is represented by the following combination of logic gate?
- A block of mass m1 rests on a horizontal table. A light string connected
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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