149546
Understanding of black body radiation spectrum culminated into the discovery of
1 Wien's law
2 Rayleigh Jeans law
3 Boltzmann law
4 Quantum law
Explanation:
D Black body is an object absorbing all electromagnetic radiation that it encounters. It then gives off thermal radiation in a continuous spectrum depending on its temperature. Blackbody emission corresponds to an electron jumping from a higher to a lower energy state. Since the electron in an excited state has several energy level below, it can jump into any and give continuous spectrum. Thus black body radiation spectrum lead to quantum law. Quantum mechanics must be applied to study Planck's energy distribution law.
J and K CET- 1998
Heat Transfer
149547
The frequency of the most intense spectral component in the thermal radiation spectrum of a black body is given by
1 Stefan-Boltzmann's law
2 Wien's law
3 Kirchhoff's law
4 Planck's hypothesis
Explanation:
B The frequency of the most intense spectral component in the thermal radiation spectrum of a black body is given by Wien's law.
J and K CET- 1997
Heat Transfer
149552
The means of energy transfer in vacuum is
1 Irradiation
2 Convection
3 Radiation
4 Conduction
Explanation:
C The only means of energy transfer in vacuum is radiation because, due to absence of matter convection and conduction are not possible.
UP CPMT-2003
Heat Transfer
149568
Ozone layer blocks the radiations of wave length:
1 less than $3 \times 10^{-7} \mathrm{~m}$
2 equal to $3 \times 10^{-7} \mathrm{~m}$
3 more than $3 \times 10^{-7} \mathrm{~m}$
4 all of the above
Explanation:
A Ozone layer is formed in the stratosphere which protect the earth from the UV-rays coming from the sun. Generally, Ozone layer block the radiation of wavelength less than $290 \mathrm{~nm}\left(290 \times 10^{-9} \mathrm{~m}\right)$.
149546
Understanding of black body radiation spectrum culminated into the discovery of
1 Wien's law
2 Rayleigh Jeans law
3 Boltzmann law
4 Quantum law
Explanation:
D Black body is an object absorbing all electromagnetic radiation that it encounters. It then gives off thermal radiation in a continuous spectrum depending on its temperature. Blackbody emission corresponds to an electron jumping from a higher to a lower energy state. Since the electron in an excited state has several energy level below, it can jump into any and give continuous spectrum. Thus black body radiation spectrum lead to quantum law. Quantum mechanics must be applied to study Planck's energy distribution law.
J and K CET- 1998
Heat Transfer
149547
The frequency of the most intense spectral component in the thermal radiation spectrum of a black body is given by
1 Stefan-Boltzmann's law
2 Wien's law
3 Kirchhoff's law
4 Planck's hypothesis
Explanation:
B The frequency of the most intense spectral component in the thermal radiation spectrum of a black body is given by Wien's law.
J and K CET- 1997
Heat Transfer
149552
The means of energy transfer in vacuum is
1 Irradiation
2 Convection
3 Radiation
4 Conduction
Explanation:
C The only means of energy transfer in vacuum is radiation because, due to absence of matter convection and conduction are not possible.
UP CPMT-2003
Heat Transfer
149568
Ozone layer blocks the radiations of wave length:
1 less than $3 \times 10^{-7} \mathrm{~m}$
2 equal to $3 \times 10^{-7} \mathrm{~m}$
3 more than $3 \times 10^{-7} \mathrm{~m}$
4 all of the above
Explanation:
A Ozone layer is formed in the stratosphere which protect the earth from the UV-rays coming from the sun. Generally, Ozone layer block the radiation of wavelength less than $290 \mathrm{~nm}\left(290 \times 10^{-9} \mathrm{~m}\right)$.
149546
Understanding of black body radiation spectrum culminated into the discovery of
1 Wien's law
2 Rayleigh Jeans law
3 Boltzmann law
4 Quantum law
Explanation:
D Black body is an object absorbing all electromagnetic radiation that it encounters. It then gives off thermal radiation in a continuous spectrum depending on its temperature. Blackbody emission corresponds to an electron jumping from a higher to a lower energy state. Since the electron in an excited state has several energy level below, it can jump into any and give continuous spectrum. Thus black body radiation spectrum lead to quantum law. Quantum mechanics must be applied to study Planck's energy distribution law.
J and K CET- 1998
Heat Transfer
149547
The frequency of the most intense spectral component in the thermal radiation spectrum of a black body is given by
1 Stefan-Boltzmann's law
2 Wien's law
3 Kirchhoff's law
4 Planck's hypothesis
Explanation:
B The frequency of the most intense spectral component in the thermal radiation spectrum of a black body is given by Wien's law.
J and K CET- 1997
Heat Transfer
149552
The means of energy transfer in vacuum is
1 Irradiation
2 Convection
3 Radiation
4 Conduction
Explanation:
C The only means of energy transfer in vacuum is radiation because, due to absence of matter convection and conduction are not possible.
UP CPMT-2003
Heat Transfer
149568
Ozone layer blocks the radiations of wave length:
1 less than $3 \times 10^{-7} \mathrm{~m}$
2 equal to $3 \times 10^{-7} \mathrm{~m}$
3 more than $3 \times 10^{-7} \mathrm{~m}$
4 all of the above
Explanation:
A Ozone layer is formed in the stratosphere which protect the earth from the UV-rays coming from the sun. Generally, Ozone layer block the radiation of wavelength less than $290 \mathrm{~nm}\left(290 \times 10^{-9} \mathrm{~m}\right)$.
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Heat Transfer
149546
Understanding of black body radiation spectrum culminated into the discovery of
1 Wien's law
2 Rayleigh Jeans law
3 Boltzmann law
4 Quantum law
Explanation:
D Black body is an object absorbing all electromagnetic radiation that it encounters. It then gives off thermal radiation in a continuous spectrum depending on its temperature. Blackbody emission corresponds to an electron jumping from a higher to a lower energy state. Since the electron in an excited state has several energy level below, it can jump into any and give continuous spectrum. Thus black body radiation spectrum lead to quantum law. Quantum mechanics must be applied to study Planck's energy distribution law.
J and K CET- 1998
Heat Transfer
149547
The frequency of the most intense spectral component in the thermal radiation spectrum of a black body is given by
1 Stefan-Boltzmann's law
2 Wien's law
3 Kirchhoff's law
4 Planck's hypothesis
Explanation:
B The frequency of the most intense spectral component in the thermal radiation spectrum of a black body is given by Wien's law.
J and K CET- 1997
Heat Transfer
149552
The means of energy transfer in vacuum is
1 Irradiation
2 Convection
3 Radiation
4 Conduction
Explanation:
C The only means of energy transfer in vacuum is radiation because, due to absence of matter convection and conduction are not possible.
UP CPMT-2003
Heat Transfer
149568
Ozone layer blocks the radiations of wave length:
1 less than $3 \times 10^{-7} \mathrm{~m}$
2 equal to $3 \times 10^{-7} \mathrm{~m}$
3 more than $3 \times 10^{-7} \mathrm{~m}$
4 all of the above
Explanation:
A Ozone layer is formed in the stratosphere which protect the earth from the UV-rays coming from the sun. Generally, Ozone layer block the radiation of wavelength less than $290 \mathrm{~nm}\left(290 \times 10^{-9} \mathrm{~m}\right)$.
