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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 ballon rises from rest with a constant acceleration g/8. A stone is released
- Wave nature of light is verified by
- A straight conductor of length 0.4 m is moved with a speed of 7 ms⁻¹perpendicular
- A body is thrown vertically up with a velocity u.It passes three points A,B and C
- The kirchoff’s first law (∑i=0) and second law (∑iR=∑E), where the symbols
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A ballon rises from rest with a constant acceleration g/8. A stone is released
- Wave nature of light is verified by
- A straight conductor of length 0.4 m is moved with a speed of 7 ms⁻¹perpendicular
- A body is thrown vertically up with a velocity u.It passes three points A,B and C
- The kirchoff’s first law (∑i=0) and second law (∑iR=∑E), where the symbols
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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