Thermal Properties of Matter
Telangana Open School (TOSS) · Class 12 · Physics
Complete topic list for Thermal Properties of Matter in Telangana Open School (TOSS) Class 12 Physics. Key concepts, sub-topics, and what to focus on for board exams.
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Topics in Thermal Properties of Matter
Modes of Heat Transfer
- Heat always flows from a hotter body to a colder body until thermal equilibrium is reached.
- Conduction occurs in solids where particles vibrate and transfer energy without moving from their positions.
- Convection happens in fluids (liquids and gases) where heated particles move upward, carrying heat with them.
Radiation and Black Body Radiation
- All objects emit radiant energy in the form of electromagnetic waves, mainly in infrared region.
- A perfect black body absorbs all incident radiation and emits radiation depending only on its temperature.
- Wien’s displacement law states that as temperature increases, the peak wavelength of emitted radiation decreases.
Greenhouse Effect and Newton's Law of Cooling
- Solar constant is the amount of solar energy received per square meter per second at Earth’s atmosphere: 1360 W/m².
- Greenhouse effect keeps Earth warm by trapping infrared radiation via CO₂ and other gases.
- Increased CO₂ from fossil fuels enhances greenhouse effect, leading to global warming.
Key Concepts
Central concept: Heat Transfer and Thermal Radiation
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