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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: - Two bodies A and B having temperature 327° C and 427° C are radiating heat
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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
- Two bodies A and B having temperature 327° C and 427° C are radiating heat
- Oil spreads over the surface of water where as water does not spread
- A body of mass 0.25 kg is projected with muzzle velocity 100 m/s from a tank
- To convert a 800 mV range millivoltmeter of resistance 40Ω into an ammeter of 100 mA
- An electric dipole of moment p is lying along a uniform electric field E. The work
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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