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Important Questions: Interference: Young's double-slit experiment and expression for fringe width, coherent sources and sustained interference of light for JEE

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Q1PhysicsUnit 16: Optics

Two coherent monochromatic light beams of intensities

I

and

4 I

are superposed. The maximum and minimum possible intensities in the resulting beam are:

Q2PhysicsUnit 16: Optics

In Young's experiment with white light, the central fringe is white. If now a transparent film is introduced in the upper beam coming from the top slit, then the white fringe:

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