Subject

Physics

Class

CBSE Class 12

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

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 Multiple Choice QuestionsShort Answer Type

41.

Explain two advantages of a reflecting telescope over a refracting telescope.


42.

Define a wavefront. Using Huygens’ principle, verify the laws of reflection at a plane surface.


43.

In a single slit diffraction experiment, the width of the slit is made double the original width. How does this affect the size and intensity of the central diffraction band ? Explain.


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44.

When a tiny circular obstacle is placed in the path of light from a distant source, a bright spot is seen at the centre of the obstacle. Explain why


A bright spot is seen at the centre of the shadow of objective because wave diffracted from the edge of the circular obstacle interface constructively at the centre of the shadow producing a bright spot.


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45.

Obtain the mirror formula and write the expression for the linear magnification.


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