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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: - Ratio of longest wavelengths corresponding to Lyman and Balmer series in hydrogen
- The minimum wavelength of X-rays produced in a Collidge tube operated
- A tangent galvanometer has a coil of 50 turns and a radius of 20 cm. The horizontal
- The binding energy per nucleon in deuterium and helium nuclei are 1.1 MeV and 7.0 MeV
- Vessel A is filled with hydrogen while vessel B, whose volume is
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Ratio of longest wavelengths corresponding to Lyman and Balmer series in hydrogen
- The minimum wavelength of X-rays produced in a Collidge tube operated
- A tangent galvanometer has a coil of 50 turns and a radius of 20 cm. The horizontal
- The binding energy per nucleon in deuterium and helium nuclei are 1.1 MeV and 7.0 MeV
- Vessel A is filled with hydrogen while vessel B, whose volume is
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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