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Three objects coloured black, grey and white can withstand hostile conditions upto 2,800° C. Which object will glow brightest?
Thermal refers to heat or temperature-related properties of matter. It involves the study of energy transfer through conduction, convection, and radiation. Thermal energy is the internal energy possessed by an object due to the motion of its particles. It plays a crucial role in various physical and chemical processes.
Class 11 Physics Chapter 10 Thermal Properties of Matter deals with the study of temperature and heat. It explains concepts like specific heat capacity, thermal expansion, and calorimetry. The chapter also covers heat transfer methods such as conduction and convection and introduces the laws of thermodynamics and the behavior of gases under different conditions.
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The Stefan-Boltzmann law states that the brightness of an object depends on its temperature and emissivity. Black objects have the highest emissivity, meaning they can emit and absorb radiation more efficiently than grey or white objects.
Since all objects can withstand the same maximum temperature of 2,800°C, the black object will glow the brightest because it has the highest emissivity and thus radiates energy more efficiently.
So, the correct answer is: the black object
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