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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: - The near point and far point of a person are 40 cm and 250 cm, respectively.
- Mass defect is known as
- An electric lamp is connected to 220 V, 50 Hz supply. Then the peak voltge is
- The binding energy per nucleon of ₃⁷Li and ₂⁴He nuclei are 5.60 MeV and 7.06MeV
- The electrons are emitted in the photoelectric effect from a metal surface
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The near point and far point of a person are 40 cm and 250 cm, respectively.
- Mass defect is known as
- An electric lamp is connected to 220 V, 50 Hz supply. Then the peak voltge is
- The binding energy per nucleon of ₃⁷Li and ₂⁴He nuclei are 5.60 MeV and 7.06MeV
- The electrons are emitted in the photoelectric effect from a metal surface
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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