CBSE Physics 12 Universe Expected Questions : Unit XII
(Derivation/Numerical Type Questions 3-Marks Questions)
1. How does we estimate the surface temperature of the sun < }
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2. Give a method for determination of distance of a superior planet from the sun.
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3. Define the term solar constant. How can the surface temperature of the sun be estimated ?
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4. Outline the parallex method for determination of the distance of planet from the earth.
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5. Define the term absolute magnitude of the star.
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6. The value of solar constant at the surface of the earth is 1400 W m-2 . Compute its value at Jupiter which is 5. 2 A.U. away from the sun.
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7. Give a method to determine the size of a star.
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8. Derive an expression connecting the mass of a binary star with its period of revolution.
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9. Name the two factors which determine whether a pianet would have atmosphere or not.
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