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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: - A thin semicircular conducting ring (PQR) of radius r is falling with its plane
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- The angle between the dipole moment and electric field at any point on the equatoria
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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 thin semicircular conducting ring (PQR) of radius r is falling with its plane
- A transformer is used to light a 100 W and 110 V lamp from a 220 V mains.
- The angle between the dipole moment and electric field at any point on the equatoria
- If rope of lift breaks suddenly, the tension exerted by the surface of the lift
- Magnetism of a magnet is due to
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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