Plane monochromatic light with intensity I_(0) falls normally on an opaque disc closing the first Fresnel zone for a point on the screen in front of the wave front. What would be the intensity I at the same point if (a) half of the disc along the diameter were removed, (b) half of the external half is removed along the the diameter ?

Plane monochromatic light with intensity I_(0) falls normally on an op

1.	Plane monochromatic light with intensity I_(0) falls normally on an opaque disc closing the first Fresnel zone for a point on the screen in front of the wave front. What would be the intensity I at the same point if (a) half of the disc along the diameter were removed, (b) half of the external half is removed along the the diameter ?
Answer» SOLUTION :`0, (l_(0))/2`

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