Q. Which of the following indicates the correct set of combination in radio waves?

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Q. How much wave length is reflected back by the earth surface from the absorbed sun radiation?

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Q. EM waves varies from ______ to ________

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Q. The formula of energy produced from the body can be given as _________

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Q. Diameter of sun can be given as ____________

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Q. The energy radiated from sun in visible region will be around ____________

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Q. The value of solar constant can be given as __________

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Q. Temperature on the sun is around ______________

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Q. Around how much percentage, the incident radiant flux can be absorbed by the materials present on earth?

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Q. Determine the spectral existence of a black body if the absolute temperature can be given as 300K.

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Q. Find the value of λ, if the temperature of the body is given as 560K.

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Q. Determine the spectral existence of a body by using plank’s law, if the wave length is given as 456m and the absolute temperature is 765K.

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Q. Determine the absolute temperature of the body from Stefan – Boltzmann law if spectral existence of the body is 3.55 * 10⁻¹⁰ W /sq. m.

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Q. From Wien’s displacement law, determine the absolute temperature if wave length is given as 0.05m.

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Q. Which among the following is not a phenomenon in case of interaction of EM waves on earth surface?

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Q. Which of the following can be changed while interaction of EM wave with a surface?

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Q. Which of the following indicates a volume phenomenon?

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Q. Determine the energy of the wave length, if the reflected, absorbed and transmitted energies were given as 56J, 24J and 7J respectively.

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Q. Find the value of reflectance if the reflected and incident energies are given as 43J and 87J.

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Q. What will be the value of absorbance, if the absorbed and incident energies are given as 67J and 109J respectively?

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