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Wien's law is concerned with [2002]
- a)relation between emissivity and absorptivity of a radiating surface
- b)total radiation, emitted by a hot surface
- c)an expression for spectral distribution of energy of a radiation from any source
- d)a relation between the temperature of a black body and the wavelength at which there is maximum radiant energy per unit wavelength
Correct answer is option 'D'. Can you explain this answer?
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Wien's law is concerned with [2002]a)relation between emissivity a...
According to Wein's displacement law, product of wavelength belonging to maximum intensity and temperature is constant i.e., λmT = constant.
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Wien's law is concerned with [2002]a)relation between emissivity a...
Wiens law is concerned with:
Explanation:
Wiens law is a basic principle in physics that relates the temperature of a black body to the wavelength at which there is maximum radiant energy per unit wavelength. It is named after the German physicist Wilhelm Wien, who first formulated the law in the late 19th century.
Key Points:
- Wiens law states that the wavelength at which the maximum intensity of radiation is emitted by a black body is inversely proportional to its temperature.
- Mathematically, the law can be expressed as λ_max = b/T, where λ_max is the wavelength at which the maximum intensity occurs, T is the temperature of the black body, and b is a constant known as Wien's displacement constant.
- The law implies that as the temperature of a black body increases, the peak wavelength of its emission shifts towards shorter wavelengths (higher frequencies).
- This means that a hotter object will emit more of its energy in the form of shorter-wavelength radiation, such as ultraviolet or visible light, while a cooler object will emit more long-wavelength radiation, such as infrared or radio waves.
- The law is important in various fields of science and technology, such as astronomy, where it is used to determine the temperature of celestial objects based on their emitted radiation.
- Wiens law also provides a theoretical basis for the concept of color temperature in lighting design, where different temperatures of light are used to create different visual effects.
- It should be noted that Wiens law specifically applies to black bodies, which are theoretical objects that absorb all incident radiation and emit radiation based solely on their temperature. Real-world objects may deviate from the predictions of Wiens law due to factors such as reflectivity or selective absorption.
Conclusion:
Wiens law is a fundamental principle in physics that describes the relationship between the temperature of a black body and the wavelength at which it emits the most radiant energy per unit wavelength. This law has numerous applications in various scientific and technological fields, and it helps us understand the behavior of thermal radiation and the concept of color temperature.
Explanation:
Wiens law is a basic principle in physics that relates the temperature of a black body to the wavelength at which there is maximum radiant energy per unit wavelength. It is named after the German physicist Wilhelm Wien, who first formulated the law in the late 19th century.
Key Points:
- Wiens law states that the wavelength at which the maximum intensity of radiation is emitted by a black body is inversely proportional to its temperature.
- Mathematically, the law can be expressed as λ_max = b/T, where λ_max is the wavelength at which the maximum intensity occurs, T is the temperature of the black body, and b is a constant known as Wien's displacement constant.
- The law implies that as the temperature of a black body increases, the peak wavelength of its emission shifts towards shorter wavelengths (higher frequencies).
- This means that a hotter object will emit more of its energy in the form of shorter-wavelength radiation, such as ultraviolet or visible light, while a cooler object will emit more long-wavelength radiation, such as infrared or radio waves.
- The law is important in various fields of science and technology, such as astronomy, where it is used to determine the temperature of celestial objects based on their emitted radiation.
- Wiens law also provides a theoretical basis for the concept of color temperature in lighting design, where different temperatures of light are used to create different visual effects.
- It should be noted that Wiens law specifically applies to black bodies, which are theoretical objects that absorb all incident radiation and emit radiation based solely on their temperature. Real-world objects may deviate from the predictions of Wiens law due to factors such as reflectivity or selective absorption.
Conclusion:
Wiens law is a fundamental principle in physics that describes the relationship between the temperature of a black body and the wavelength at which it emits the most radiant energy per unit wavelength. This law has numerous applications in various scientific and technological fields, and it helps us understand the behavior of thermal radiation and the concept of color temperature.
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Wien's law is concerned with [2002]a)relation between emissivity and absorptivity of a radiating surfaceb)total radiation, emitted by a hot surfacec)an expression for spectral distribution of energy of a radiation from any sourced)a relation between the temperature of a black body and the wavelength at which there is maximum radiant energy per unit wavelengthCorrect answer is option 'D'. Can you explain this answer?
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