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    Subject
    Physics

    Class

    ICSE Class 12

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    ISC Class 12 Physics Solved Question Paper 2007

    Multiple Choice QuestionsShort Answer Type

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    11. A ray of light incident in air for a certain air-glass surface of separation has a polarizing angle of 56°. What will be the angle of refraction in glass ?

    Given,

    Polarizing angle i = 56°

    Angle of refraction r = ?

    r = 90°- i

    r = 90°- 56°

    r = 34°

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    12. The angle of an equilateral glass prism is 59.5°. The angle of minimum deviation is 38.5°. Without using the value of refractive index of the glass, calculate the angle of incidence for a ray of light suffering minimum deviation.
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    13. Draw a ray diagram for a convex lens illustrating linear chromatic aberration.
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    14. Define luminous intensity of a point source.
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    15. Calculate the momentum of a photon of green light of λ = 500 nm in SI unit.
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    16. Mention any one postulate of Bohr’s theory of hydrogen atom.
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    17. Show graphically the variation in the mass of a radioactive substance with time. Mark the values of time on the x-axis in terms of half-life (T, 2T, 3T etc.) and the corresponding values of mass on the y-axis.
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    18. Draw a labelled sketch to illustrate pair production.
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    19. What is meant by energy gap in solids ?
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    20. Draw the circuit diagram of a half-wave rectifier using a p-n junction diode.
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