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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 ray of light travelling in a transparent medium of refractive index µ, falls on surface
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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 ray of light travelling in a transparent medium of refractive index µ, falls on surface
- Two bulbs when connected in parallel to a source take 60W each, the power consumed,
- A lift is moving down with acceleration a.A man in the lift drops a ball
- A bubble is rising from bottom of a lake. The volume of bubble becomes
- Two waves are represented by the equations y₁ = a sin (?t + kx + 0.57) m
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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