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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.
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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
- A person can see clearly objects only when they lie between 50 cm and 400 cm from
- The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain
- A series combination of n₁ capacitors, each of value C₁, is charged by a source
- If the binding energy of the electron in a hydrogen atom is 13.6 eV, the energy
- The amount of heat energy required to raise the temperature of 1 g of Helium
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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